Removing malware from your PC involves a series of steps that require careful attention to detail. Malware, short for malicious software, can include viruses, spyware, adware, ransomware, and more. It can significantly compromise your personal data, slow down your computer, or even render it inoperable. Here’s an in-depth guide to identifying and removing malware from your PC, along with helpful online resources for further assistance.

Step 1: Disconnect from the Internet

The first step is to disconnect your computer from the internet. This prevents the malware from sending or receiving information, limiting its ability to do further harm.

Step 2: Enter Safe Mode

Restart your PC in Safe Mode. Safe Mode starts your computer with a minimal set of drivers and services. Malware loaded in normal mode may not automatically run in Safe Mode, making it easier to remove.

• For Windows 10 and 8: Hold the Shift key while you select Power > Restart. After your PC restarts, go to Troubleshoot > Advanced options > Startup Settings > Restart. When it restarts again, press F5 to enter Safe Mode with Networking.
• For older versions: Reboot your computer and repeatedly tap the F8 key until the Advanced Boot Options menu appears. Select Safe Mode with Networking.

Step 3: Delete Temporary Files

Before running a malware scan, delete temporary files. This can speed up the scanning process and even remove some malware. Use the Disk Cleanup tool:

• Type “Disk Cleanup” in the Windows search box and select the Disk Cleanup app. Choose the drive you want to clean, and select the file types to delete.

Step 4: Run a Malware Scanner

Use a reputable antivirus or malware scanner to run a full system scan. If you don’t have one installed, consider downloading a program like Malwarebytes, Avast, or Bitdefender. Follow the software’s instructions to install and run a scan.

Helpful Links:

• Malwarebytes Free
• Avast Free Antivirus
• Bitdefender Antivirus Free Edition

Step 5: Review the Scan Results

After the scan, review the findings. The software will typically offer options to quarantine, delete, or repair the affected files. It’s generally recommended to quarantine or delete the malicious files.

Step 6: Update Your Software

Ensure that your operating system and all software, especially your web browser and antivirus program, are up-to-date. Malware often exploits vulnerabilities in outdated software.

Step 7: Reset Your Browser

Malware can make changes to your browser settings. Reset your browser to its default settings to undo these changes. Check your browser’s help pages for instructions on resetting it.

Step 8: Clear Restore Points

Some malware can hide in system restore points. After removing the malware, clear your restore points and create a new one:

• Search for “Create a restore point” in the Windows search box, open it, go to the System Protection tab, select your system drive, and click Configure. Disable system protection, apply the changes, and then re-enable it to clear out old restore points.

Step 9: Stay Protected

To prevent future infections, practice safe browsing habits. Don’t click on suspicious links or download files from unreliable sources. Keep your antivirus software running and regularly updated.

Additional Resources:

• Microsoft’s guide to malware protection
• How to remove malware (Federal Trade Commission)

By following these steps and utilizing the recommended resources, you can effectively remove malware from your PC and take measures to prevent future infections. Remember, maintaining a proactive stance on digital security is the best defense against malware.

To further assist you in removing malware and enhancing your computer’s security, consider exploring the following resources and tools, each offering unique features and capabilities for different aspects of malware removal and system protection.

HitmanPro

HitmanPro is an advanced malware removal tool that excels in finding and destroying malware with a no-nonsense approach. It’s particularly effective due to its small size, quick download, and the ability to run without installation, saving only 10MB of space. What sets HitmanPro apart is its behavior-based scanning, leveraging malware databases from four security labs, including SophosLabs, to provide thorough cleaning. It also focuses on removing malware without leaving residues, thereby restoring damaged Windows resources to their safe, original versions.

• Main information and downloads can be found on HitmanPro’s official website: HitmanPro Advanced Malware Removal Tools [❞].
• For downloading the tool, visit the download page: Download HitmanPro [❞].
• Detailed information about the tool’s capabilities and the technology behind it is available here: HitmanPro Malware Removal Tool [❞].

These resources should provide you with a comprehensive understanding and access to HitmanPro, a tool renowned for its efficiency in removing various types of malware and restoring system integrity. Remember, the key to maintaining a secure system is not just in removing existing threats but also in preventing future infections through vigilant practices, regular updates, and the use of reliable security tools.

For optimal security, initiating your PC via a clean boot disk or USB is recommended. Once started, conducting an offline scan for malware and viruses using Malwarebytes, HitmanPro, and Kaspersky ensures the highest level of safety. If you require assistance in creating a clean bootable USB, please don’t hesitate to contact us.

MICROSOFT.

How to prevent and remove viruses and other malware

Windows 7 Enterprise Windows 7 Home Basic Windows 7 Home Premium Windows 7 Professional Windows 7 Starter Windows 7 Ultimate 

What is malware?

Malware is a term that is used for malicious software that is designed to do damage or unwanted actions to a computer system. Examples of malware include the following:

• Viruses
• Worms
• Trojan horses
• Spyware
• Rogue security software

Select a heading below for more information 

What is a computer virus?

A computer virus is a small software program that spreads from one computer to another and interferes with computer operation. A computer virus might corrupt or delete data on a computer, use an email program to spread the virus to other computers, or even delete everything on the hard disk.

Computer viruses are frequently spread by attachments in email messages or by instant messaging messages. Therefore, you must never open an email attachment unless you know who sent the message or you are expecting the email attachment. Viruses can be disguised as attachments of funny images, greeting cards, or audio and video files. Computer viruses also spread through downloads on the Internet. They can be hidden in pirated software or in other files or programs that you might download.

Tip: For information about the symptoms of a computer virus, go to the Microsoft PC Security website.

What is a worm?

A worm is computer code that spreads without user interaction. Most worms begin as email attachments that infect a computer when they’re opened. The worm scans the infected computer for files, such as address books or temporary webpages, that contain email addresses. The worm uses the addresses to send infected email messages, and frequently mimics (or spoofs) the “From” addresses in later email messages so that those infected messages seem to be from someone you know. Worms then spread automatically through email messages, networks, or operating system vulnerabilities, frequently overwhelming those systems before the cause is known. Worms aren’t always destructive to computers, but they usually cause computer and network performance and stability problems.

What is a trojan horse?

A trojan horse is a malicious software program that hides inside other programs. It enters a computer hidden inside a legitimate program, such as a screen saver. Then it puts code into the operating system that enables a hacker to access the infected computer. Trojan horses do not usually spread by themselves. They are spread by viruses, worms, or downloaded software.

What is spyware?

Spyware can install on your computer without your knowledge. These programs can change your computer’s configuration or collect advertising data and personal information. Spyware can track Internet search habits and can also redirect your web browser to a different website than you intend to go to.

What is rogue security software?

A rogue security software program tries to make you think that your computer is infected by a virus and usually prompts you to download or buy a product that removes the virus. The names of these products frequently contain words like Antivirus, Shield, Security, Protection, or Fixer. This makes them sound legitimate. They frequently run right after you download them, or the next time that your computer starts. Rogue security software can prevent applications, such as Internet Explorer, from opening. Rogue security software might also display legitimate and important Windows files as infections. Typical error messages or pop-up messages might contain the following phrases:

Warning!
Your computer is infected!
This computer is infected by spyware and adware.

Note If you receive a message in a popup dialog box that resembles this warning, press ALT + F4 on your keyboard to close the dialog box. Do not click anything inside the dialog box. If a warning, such as the one here, keeps appearing when you try to close the dialog box, it’s a good indication that the message is malicious.

Are you sure you want to navigate from this page?
Your computer is infected! They can cause data lost and file corruption and need to be treated as soon as possible. Press CANCEL to prevent it. Return to System Security and download it to secure your PC.
Press OK to Continue or Cancel to stay on the current page.

If you see this kind of message, then don’t download or buy the software.

For more information see Protect yourself from tech support scams. 

How to remove malware such as a virus, spyware, or rogue security software

Removing a computer virus or spyware can be difficult without the help of malicious software removal tools. Some computer viruses and other unwanted software reinstall themselves after the viruses and spyware are detected and removed. Fortunately, by updating the computer and by using malicious software removal tools, you can help permanently remove unwanted software.

For more information about how to remove a computer virus and spyware, see the following article in the Microsoft Knowledge Base: 2671662 – Microsoft resources and guidance for removal of malware and viruses

1. Install the latest updates from Microsoft Update

Note A computer virus may prevent you from accessing the Microsoft Update website to install the latest updates. We recommend that you set the Automatic Updates service to run automatically so that a computer is not missing any important updates.

For more information, see Windows Update: FAQ

Windows 7

1. Click Start, and then type Windows Update in the search box.
2. In the results area, click Windows Update.
3. Click Check for Updates.
4. Follow the instructions to download and install the latest Windows Updates.

2. Use the free Microsoft Safety Scanner

Microsoft offers a free online tool that scans and helps remove potential threats from your computer. To perform the scan, go to the Microsoft Safety Scanner website.

3. Use the Windows Malicious Software Removal Tool

For more information about the Microsoft Malicious Software Removal Tool, see the following article in the Microsoft Knowledge Base:

890830 – Remove specific prevalent malware with Windows Malicious Software Removal Tool

4. Manually remove the rogue security software

If the rogue security software can’t be detected or removed by using Microsoft Safety Scanner or the Windows Malicious Software Removal Tool, try the following steps:

1. Note the name of the rogue security software. For this example, we’ll call it XP Security Agent 2020.
2. Restart your computer.
3. When you see the computer’s manufacturer’s logo, repeatedly press the F8 key.
4. When you are prompted, use the arrow keys to highlight Safe Mode with Networking, and then press Enter.
    Tip: Safe Mode starts Windows with only the minimum number of drivers and services necessary for operation. This often prevents malware or other misbehaving software from loading and makes it easier to clean them out.
5. Click the Start button and check whether the rogue security software appears on the Start menu. If it’s not listed there, click All Programs and scroll to find the rogue security software’s name.
6. Right-click the name of the rogue security software program, and then click Properties.
7. Click the Shortcut tab.
8. In the Properties dialog box, check the path of the rogue security software program that is listed in Target. For example, C:\Program Files\XP Security Agent 2020.Note: The folder name is frequently a random number or string of characters.
9. Click Open File Location.
10. In the Program Files window, click Program Files in the address bar.
11. Scroll until you find the rogue security software program folder. For example, XP Security Agent 2020.
12. Right-click the folder, and then click Delete.
13. Restart your computer.
14. Go to the Microsoft Safety Scanner website.
15. Click the Download Now button, and then click Run.
16. Follow the instructions to scan your computer and help remove the rogue security software.

If you suspect that your computer is infected with rogue security software that was not detected by using Microsoft security solutions, you can submit samples by using the Microsoft Malware Protection Center submission form.

5. Run Microsoft Defender Offline

Microsoft Defender Offline is an anti-malware tool that helps remove difficult to eliminate viruses that start before Windows starts. Starting with Windows 10, Microsoft Defender Offline is built in. To use it follow the steps in this article: Help protect my PC with Microsoft Defender Offline.

Windows 7 or Windows 8

1. On an uninfected computer, go to Help protect my PC with Microsoft Defender Offline.
2. Click Download the 32 bit version or Download the 64 bit version, depending on which operating system that you are running. If you’re unsure of which operating system that you are running, see Is my PC running the 32-bit or 64-bit version of Windows.
3. When you are prompted, click Save As, and then save the file to a DVD, CD, or USB flash drive.
4. On the infected computer, insert the DVD, CD, or USB flash drive, and then restart the computer.
5. When you are prompted, press a key to select an option to use to start your computer, such as F12, F5, or F8, depending on the kind of computer that you are using.
6. Use the arrow key to scroll to the drive where you installed Microsoft Defender Offline file. Microsoft Defender Offline starts and immediately scans for malware.

Why do we often have to restart your computer in order to remove malware? 

Once malware is running in your computer’s memory it can be harder to remove. The malware is often created with what we call “persistence” which means that if it’s running and sees that its files have been deleted or quarantined by security software, the malware will attempt to re-write the files to your drive.

Restarting gives us a chance to load Windows without loading the malware, so we can clean the files off the drive without the malware in memory attempting to reinstall itself.

How to protect your computer against malware

There are actions that you can take to help protect your computer against malware.

Turn on the firewall

Confirm that the Windows firewall is turned on. See Turn Microsoft Defender Firewall on or off for instructions on how to do that on modern versions of Windows.

Windows 7

1. Click the Start button, and then click Control Panel.
2. In the Search box, type firewall, and then click Windows Firewall.
3. In the left pane, click Turn Windows Firewall on or off (you may be prompted to enter your administrator password).
4. Under each network location, click Turn on Windows Firewall, and then click OK.

Keep your computer up to date

For more information about how to set Automatic Updates in Windows, see Windows Update: FAQ

Don’t be tricked into downloading malware

Here are some tips that can help protect you from downloading software that you don’t want:

• Only download programs from sites that you trust. If you’re not sure whether to trust a program that you want to download, enter the name of the program into your favorite search engine to see whether anyone else has reported that it contains spyware.
• Read all security warnings, license agreements, and privacy statements that are associated with any software that you download.
• Never click “Agree” or “OK” to close a window that you suspect might be spyware. Instead, click the red “x” in the corner of the window or press Alt + F4 on your keyboard to close a window.
• Be wary of popular “free” music and movie file-sharing programs, and make sure that you understand all the software packaged with those programs.
• Use a standard user account instead of an administrator account. An administrator account can access anything on the system, and any malware run with an administrator account can use the administrator permissions to potentially infect or damage any files on the system.

For more information about how to protect a computer against viruses, see Protect my PC from viruses.

How to obtain computer virus and security-related support

In the United States:

Want to chat with a live person? Our Answer Tech trained professionals are ready to help:

Answer Desk

Security information and training

Microsoft Security Help and Learning

Security solutions for IT Professionals:

Microsoft Security and Response Center

For locations outside North America:

For computer virus and security-related support for locations outside North America, go to the Microsoft Support website.

What are computer viruses?Computer viruses are a type of malicious software that infects a computer and hijacks its resources to self-replicate and spread. Computer viruses inject their own malicious code into programs or files, and they can inflict lots of damage, including corrupting or erasing files and stealing sensitive data.

How do computer viruses spread?

Computer viruses spread by self-replication. Once inside your Mac or PC, they make copies of themselves and spread via infected email attachments, poisoned macros, or malicious links. A virus might email itself out to your contacts, who then unwittingly send it to their contacts, and so on. That causes the virus infection to spread exponentially — especially if your contacts don’t know the difference between a fake virus warning and real malware detection on their device.

Email is one of the most popular malware delivery methods, so email security is critical. Viruses and other malware can also spread through file sharing and software bundles. When you download an app from a disreputable source outside Apple’s App Store or Google Play, it can come packaged with malicious software or bloatware.

Malware also spreads through vulnerabilities in outdated software. When these vulnerabilities are identified, companies release software updates to patch the issue and prevent viruses and other malware infections from spreading. If you forget to update your software regularly, dangerous hackers can exploit the vulnerabilities in old software to gain access to your device and inject malware.

Viruses can spread to other devices via texts, emails, software vulnerabilities, removable media, or malicious internet downloads.

Signs of a computer virus

To see if your computer has a virus or other malware, look for abnormal behavior, suspicious files or downloads, or frequent crashes. These virus signs will help you detect an infection on both Macs and PCs.

Here are some other signs of a virus infection on your computer:

• A very slow computer
• Excessive pop-ups that appear out of nowhere and are hard to remove
• Unfamiliar programs or apps
• Different settings that you didn’t change
• Corrupted or erased files
• A Whirring or other loud sound coming from your computer or hard drive
• An incessantly loud computer fan
• An overheating computer
• Frequent crashes, freezes, or other unusual behavior

Any one of these symptoms might be caused by a virus or a different kind of malware, like spyware or a cryptominer. If you’re experiencing two or three of them at the same time, that’s a strong indication that you’ve got a virus or that your computer has been hacked.

Removing a virus from a PC

Whether you have a virus or another kind of malware on your laptop or desktop computer, the following steps will help you scan for viruses and get rid of the malware immediately.

1. Download and install antivirus software

There are two main types of antivirus software that can detect and remove computer viruses and malware: real-time and on-demand. A real-time malware scanner scans for viruses in the background while you’re using your computer. An on-demand scanner, like Microsoft Defender, has to be turned on every time you want to check for malware.

For full virus and malware protection — especially against new and emerging threats — install real-time malware scanning and removal software like AVG AntiVirus FREE. AVG offers stronger protection than the standard tools you get from PC manufacturers, whether you’re on a laptop or a desktop computer.

Install free AVG AntiVirus

Get it for PC, Mac, iOS

2. Run a virus scan

After installing your antivirus software, you need to check your computer for any malware by running a full virus scan. A comprehensive scanner will search your computer for any malicious code hiding in Windows, and it will get rid of it. Open your antivirus app and select Run Smart Scan. If you have AVG AntiVirus, you can easily set it up to scan your laptop for malware automatically.

3. Delete or quarantine infected files

After scanning your PC, your antivirus software will let you know if any malware is found. Follow the steps to remove the virus or put any infected files into quarantine.

AVG AntiVirus FREE easily removes viruses and prevents future malware infections.

4. Restart your computer

After deleting the infected files from quarantine, restart your computer. Your laptop’s malware infection will be gone.

More virus removal options

If the steps above don’t get rid of the infection, you’ll need to scan your computer more thoroughly in case you have a type of malware — like a Trojan to adware — that’s designed to hide deep in your system.

Enter Safe Mode

First, restart your computer in Safe Mode. Safe Mode launches only Windows’s basic startup settings, such as necessary files, programs, and drivers.

To enter Safe Mode on Windows 10 or Windows 11, hold down the Shift key while selecting Power > Restart. After your computer restarts, select Troubleshoot > Advanced options > Startup Settings. Then, click Restart again. After your laptop or desktop restarts, select 4 (or F4) to enter Safe Mode.

Delete temporary files

Next, erase your temporary files to remove any malicious apps or programs you may have recently downloaded that might have caused your malware infection.

Here’s how to delete temporary files in Windows 10 or Windows 11 while in Safe Mode.

Start typing Disk Cleanup into the search field on the Windows taskbar and select it when it comes up. Then select the drive you want to remove temporary files on. Scroll through the list of files to delete and check the box next to Temporary files. Then click OK.

Removing temporary files will get rid of any malware that recently entered your system — and it can help you speed up your computer, too.

Schedule a boot-time scan

If you can’t get rid of the virus after deleting temporary files, then the malware could be programmed to start when your computer boots up. In that case, you need to run a boot-time virus scan.

A boot-time scan is an advanced antivirus feature designed to root out system-level malware before the operating system and other programs boot up.

Here’s how to run a boot-time scan to check for a computer virus: Open your antivirus app. In the scans tab or in settings, you’ll see an option for a boot-time scan. You should also see options about what to do with any infected files found during the scan — fix them, quarantine them, or delete them. Choose your preferred setting.

After you’ve set up your boot-time scan, the next time you restart your PC, your antivirus will automatically scan your laptop or desktop for any threats. Note that boot-time scans can take a while, so your next restart will likely take longer than normal.

Removing a virus from a Mac

If your Mac has malware, you need to get rid of it fast before the infection spreads. These steps will help you remove malware on a Macbook, iMac, Mac mini, or any other type of Apple computer running the macOS (formerly known as OS X) operating system.

Here’s how to get rid of malware on your Mac laptop or desktop:

1. Install the latest macOS update

Updated software often includes patches that plug security vulnerabilities in previous versions. The latest version of macOS will have the most up-to-date anti-malware protections.

To update macOS, click the Apple icon in the top left of your screen and select About This Mac. Then click More info > Software Update. If an updated version of macOS is available, follow the steps to install it. After installation is complete, restart your computer and your malware problem could be fixed.

2. Use a specialized Mac antivirus tool

The best way to make sure all malware is found and removed is to use antivirus software to scan your Macbook for viruses and malware. An anti-malware app will detect and repair malware infections on macOS, OS X, and other versions of Apple’s operating system.

Here’s how to remove Mac malware with a specialized Mac virus scanner. To begin, download AVG AntiVirus FREE for Mac.

Download AVG AntiVirus FREE

Get it for Android, PC, iOS

After the download is complete, click the file to begin installation and follow the on-screen instructions. Then, open the app and click Run Smart Scan.

If malicious software, apps, or hidden files are found, follow the on-screen instructions to get rid of the malware on your Mac.

And that’s it. Your Mac malware problem is fixed, and AVG AntiVirus FREE’s non-stop protection against new and emerging threats will keep your computer protected against viruses and malware in the future.

3. Uninstall suspicious apps

If your malware problem persists after you have the latest OS installed and you’re using dedicated antivirus software on your Mac laptop or desktop, it’s time to look more closely at certain apps and programs.

If the virus infection started around the time you downloaded new software, that new software may be responsible for the virus or malware infection. Although the Apple App Store vets apps, malware can sneak through. And if you downloaded anything directly from a developer’s website, it could also contain malware.

Here’s how to get rid of suspicious apps on your Mac to root out a malware infection.

Open Go > Applications and find any suspicious apps (apps with strange names or programs you don’t remember downloading yourself). Right-click on the suspicious app and choose Move to Bin (Move to Trash).

Finally, right-click on your Bin (Trash) and select Empty Bin to make sure the suspicious file is completely removed from your computer.

4. Remove harmful browser extensions

Browser extensions are a common malware vector. If your web browser’s settings have changed and you’re seeing a different homepage, new toolbars, or tons of ads, you may have a browser hijacker or adware infection. Removing these unwanted browser extensions can help get rid of a malware infection and clear viruses from your computer.

Remove browser extensions from Safari

To get rid of malware in Safari browser extensions, open the Safari menu and choose Settings.

Choose Extensions in the top navigation and look for any browser extensions that you don’t remember installing. Select the extensions you don’t need or don’t recognize — these may be malicious — and click Uninstall.

Then, check out our guide to managing your Safari pop-up settings to minimize the risk of inadvertently getting malware from a risky ad or pop-up.

Remove browser extensions from Google Chrome

If you use Google Chrome on your Mac, here’s how to remove browser extensions in Chrome in case they’re concealing malware.

Open Chrome and click the three vertical dots in the upper right of the browser window. Select More Tools > Extensions.

Choose any extensions that may contain malware or that you don’t need and click Remove.

To avoid malicious browser extensions altogether, use a browser with built-in security and privacy that will block malicious extensions automatically, so you won’t need to worry about clearing viruses hiding in extensions anymore.

To learn more about the Mac threatscape, check out our in-depth Mac security guide.

How to prevent viruses and malware in the future

Malware prevention is always easier than malware removal. Here are some quick and easy things you can do to avoid downloading malware on your laptop:

• Install the latest software updates.
  Software updates include critical security patches. Update your software regularly to stay protected against the latest virus and malware strains.
• Get an antivirus program.
  Using an antivirus app will protect you against malware and viruses before they infect your computer. The best antivirus software also includes protection against malicious websites, phishing scams, unsafe downloads, and more.
• Back up your data regularly.
  Many malware strains, especially ransomware, can compromise your data. If you have a backup of all your data, you’ll be able to factory reset your computer without losing anything. Learn more with our complete guide to Mac ransomware.
• Be wary of pop-ups.
  Avoid clicking on pop-up messages, especially those that claim to have detected a problem with your computer. Pop-ups designed to scare you into downloading unsafe security apps are just malware in disguise.
• Watch out for strange emails.
  Practice safe email practices, and don’t open emails from unknown or untrusted addresses. If you do happen to open one, don’t click any links and don’t open any attachments.
• Use strong antivirus software.
  A strong antivirus is your best defense in the fight against online threats. AVG AntiVirus FREE features powerful built-in technology to block dangerous downloads and malicious websites. And with around-the-clock software monitoring, you’ll stay protected against any suspicious activity.

Install free AVG AntiVirus

Get it for PC, Mac, iOS

How to prevent Mac malware

Mac malware is on the rise, but some Mac users are still a bit careless about their online security. Here are some tips to avoid viruses and malware on Mac computers.

• Keep all your software and apps updated.
  Make sure that your Mac is running the latest operating system and that you’ve installed any updates directly from Apple. Opt for auto-updates in the App Store for all apps and OS updates.
• Look out for fake Mac antivirus apps.
  Some Mac malware poses as an antivirus app — such as MacDefender, MacProtector, and MacSecurity. But, it’s likely just scareware offering to solve a nonexistent problem on your laptop.If you click, you’re probably downloading malware instead. If you download something malicious from a website, quit your browser, go to your Downloads folder, move new items to the Trash, then empty the Trash. And don’t visit the website again because it’s probably been hacked.
• Quit the infected app.
  If you think malware has already been installed on your Mac — especially if you’re seeing pop-up messages asking for your Apple ID or credit card details — quit the app that you think might be infected.Open your Activity Monitor and find the app in question — or search for the malware from the list of names above. When you’ve identified the malware, select it, then click the Stop button. Finally, go into your Applications folder, drag the unwanted software into the Trash, and empty the Trash.
• Use specialized Mac antivirus software.
  Give your Mac strong malware protection. AVG AntiVirus for Mac is a free and comprehensive cybersecurity tool with real-time protection against malware and other security risks. And it’s updated automatically to safeguard your Mac against the latest online threats.

Download AVG AntiVirus FREE

Get it for Android, PC, iOS

Can’t I just use Windows Defender?

PC users may be wondering if they can simply use Windows Defender — Microsoft’s built-in antivirus program — to stop malware. Although it’s improved in recent years, Windows Defender doesn’t offer as much protection as dedicated antivirus programs.

Windows Defender — now called Microsoft Defender — has had good malware prevention scores in independent tests, but it can struggle to detect new and emerging threats. In a 2021 test from AV-Comparatives, Windows Defender’s virus detection rate was much lower than most third-party security solutions.

Defender also lacks adequate protection against phishing attacks, Wi-Fi threats, and unsafe websites (unless you use Microsoft Edge). Plus, Windows’s own updates have a history of introducing bugs that hamstring Defender’s protection abilities.

Without dedicated antivirus software on your machine, Windows Defender will provide some level of protection for your PC. But to defend against the wide array of threats — and emerging threats like zero-day attacks — we recommend AVG AntiVirus FREE, a comprehensive security suite that scores higher in AV Comparatives tests and provides more advanced features.

Are my other devices safe?

Any device connected to an infected computer is vulnerable to malicious software. While a traditional computer virus is unlikely to spread to mobile devices, Android phones and tablets are susceptible to mobile spyware, Android ransomware, and other phone hacking tricks.

iOS devices are a bit more resistant to malware than Androids. That mainly has to do with Apple’s defenses, such as app sandboxing and security updates on all devices — but your iPhone isn’t immune to threats. Phishing scams, unsafe Wi-Fi networks, and identity theft can all affect iOS users. For more information, check out our guide to the best security apps for your iPhone.

If your phone has been acting strangely and you think there’s an infection, learn how to remove a virus and malware from your phone. Or, get an app that will do it for you:

• Android antivirus
• iPhone antivirus

Get rid of viruses and malware the easy way

If you want to learn how to remove a virus from a PC or get rid of malware on Mac, the easiest way is to use a robust antivirus program from a reputable developer. AVG AntiVirus FREE works around the clock to give you comprehensive threat protection.

Remove all traces of malicious software from your laptop or desktop computer and stay safe against future infections and emerging threats. Download AVG today and join the world’s largest threat detection network.

Install free AVG AntiVirus

Get it for PC, Mac, iOS

DESKTOP MAC WINDOWS

MalwareBytes:

10 easy steps to clean your infected computer

You log onto your computer and it takes forever to boot. When it finally does, a few unfamiliar applications litter your desktop, and your browser immediately sends you to an ad for hair loss products.

Sounds like your PC has a problem with malware.

So what should you do? Before you flip out, try these simple steps to clean up your infected computer.

1. Computer acting suspect? Do a little digging and check for symptoms.

Look for issues characteristic of a malware infection:

• Does your web browser freeze or become unresponsive?
• Do you get redirected to web pages other than the ones you are trying to visit?
• Are you bombarded with pop-up messages?
• Does your computer run slower than usual?
• Do you see new icons on your desktop that you don’t recognize?
• Are your fans spinning suspiciously louder or harder than usual?

Unfortunately, even if you see nothing wrong with your computer, there may be trouble brewing under the surface, sneaking around and screwing with your files undetected. So it’s a safe bet to move on to Step 2 even if you can’t find a symptom.

2. Use protection: Enter safe mode.

• Remove CDs and DVDs, and unplug USB drives from your computer. Then shut down.
• When you restart, press the F8 key repeatedly. This should bring up the Advanced Boot Options menu.
• Select Safe Mode with Networking and press Enter. Only the bare minimum programs and services are used in this mode. If any malware is programmed to automatically load when Windows starts, entering safe mode may block the attempt.

3. Back up your files.

• This includes documents, photos, and videos. Especially cat videos.
• Do not back up program files, as those are where infections like to hide. You can always download these programs again if files are lost.

4. Download an on-demand malware scanner such as Malwarebytes.

• If you had no trouble connecting to the Internet before you suspected the infection, you can leave Safe Mode after having backed up your files and return to using your “normal” system.
• If your Internet was jammed up by a suspected infection, try using a friend’s computer to download your scanner and move it to your machine using a USB drive.
• Follow set-up instructions and install the program.

5. Run the scan.

• If you truly believe you are infected, do not pass go, do not collect $100. Just go directly to the scan. If you do have an infection, your on-demand scanner should let you know that you in danger, girl. A list of scan results tells you what malware was found and removed.
• Some cybersecurity software also flags potentially unwanted programs (PUPs) and puts them in the corner with Baby. If you’d like to keep a program your malware scanner deems is suspect, you can add it to an exclusions list and go about your day.

6. Restart your computer.

• After all, everyone deserves a second chance.

7. Confirm the results of your anti-malware scan by running a full scan with another malware detection program.

• You can try a program such as AdwCleaner, which targets PUPs and adware (those obnoxious pop-ups littering your browser).
• Restart again if the program found additional infections.

8. Update your operating system, browser, and applications.

• If there’s an update available on any of your software, go ahead and do it. Some of the most dangerous forms of malware are delivered by exploits that take advantage of out-of-date software.

9. Reset all of your passwords.

• Before being deleted, malware could have captured your passwords and forwarded them to criminals. Change each and every password you can think of, and make sure they’re strong. None of this 1, 2, 3, 4, 5 business. That’s the combination an idiot would use on his luggage.

10. If, after all of these steps, you’re still having problems with a possible infection, feel free to post your question in our public forum.

And if you want your Mac, iPhone, or Android phone as shiny and new as your PC after a cleaning, you can run anti-malware scans on these devices as well.

Berkleys University:

Cleaning an Infected Computer of Malware

If the system has any data classified as Protection Level 4 (P4)
disconnect it from the network – don’t turn it off or unplug it – and
immediately contact at (510) 664-9000 (option 4) 

Attackers often leave “backdoors” on a compromised computer and removing them all can be difficult, if not impossible. We recommend reinstalling your operating system, but if that is not practical you can try this option first.

Note: If you receive a security notice from ISO after attempting to clean the computer, you MUST reinstall the operating system (see Reinstalling Your Compromised Computer for instructions).

Instructions for Microsoft Windows operating systems:

1. Make sure your antivirus software is up-to-date.

Windows 10 comes with Windows Defender.

1.1 Double-click on the white shield icon in the icon tray bar (notification area) on the lower right portion of your screen (or search for “Windows Defender” from the Start Menu). When you move your mouse over the icon, it should say “PC Status: Protected”.

1.2 Click the “Update” tab, click on the “Update” button and follow the prompts.

2. Reboot your computer into safe-mode 

Follow these specific instructions for Windows 10: https://support.microsoft.com/en-us/help/12376/windows-10-start-your-pc-in-safe-mode(link is external).

2.1 Once in Safe Mode, you’ll want to run a virus scan. But before you do that, delete your temporary files. Doing so may speed up the virus scanning, free up disk space, and even get rid of some malware. To use the Disk Cleanup utility included with Windows 10 just type Disk Cleanup in the search bar or after pressing the Start button and select the tool that appears named Disk Cleanup

2.2 Next, while still in Safe Mode, run a full scan of your system: Double-click on the white Windows Defender shield icon in the icon tray bar (notification area) on the lower right portion of your screen and select. When you move your mouse over the icon, it should say “PC Status: Protected.”

2.3 On the “Home” tab select “Full” and click the “Scan now” button.

3. Download and install an Anti-Spyware program

3.1 These programs have free versions that can be run for personal use and have solid reputations. 

• MalwareBytes (https://www.malwarebytes.com/(link is external)),
• Spybot – Search and Destroy (http://www.safer-networking.org/(link is external)) or
• Ad-Aware (http://www.lavasoft.com/products/ad_aware_free.php)(link is external).*

Note: Keep in mind that some adware/spyware alerts, particularly cookies, may be fairly innocent and not represent a serious threat to your system’s safety. The alerts to be concerned about are primarily those that represent installed programs or browser plug-ins/add-ons that you cannot identify.

If these steps do not return any significant problems, then the system is probably ok to use. However, be wary of any issues you notice. If these steps do not resolve the issue, you must rebuild your operating system: Reinstalling Your Compromised Computer.

* This list does not represent endorsement by the University of California or its affiliates.

TOPICS

• Cybersecurity Awarenesstopic page
• Securing Your Devices

Kaspersky:

Are you concerned that your computer may have a virus? If your computer is infected, learning how to get rid of a computer virus is vital.

This article teaches you all there is to know about how computer viruses work and computer virus removal.

Read on as we discuss:

• How to get rid of a computer virus.
• What a computer virus is.
• How to tell if your computer has a virus.
• Whether your computer can become infected with a virus via email.
• How to protect your computer from viruses.

How to get rid of a computer virus

In this section, we explore how to get rid of a computer virus from a PC and from a Mac.

Removing a computer virus from a PC

Computer viruses are almost always invisible. Without anti-virus protection, you may not know you have one. This is why it is vital to install anti-virus protection on all your devices.

If your PC has a virus, following these ten simple steps will help you to get rid of it:

Step 1: Download and install a virus scanner

Download a virus scanner or complete internet security solution. We recommend Kaspersky Internet Security. The video below will guide you through the installation process:https://www.youtube.com/embed/NMYbkzjI5EY

Step 2: Disconnect from internet

When you are removing a virus from your PC, it is a good idea to disconnect from the internet to prevent further damage: some computer viruses use the internet connection to spread.

Step 3: Reboot your computer into safe mode

To protect your computer while you remove the virus, reboot it in ‘Safe Mode’. Are you unsure of how to do this?

Here is a simple guide:

• Turn your computer off and on again
• When the screen lights, press F8 to bring up the ‘Advanced boot options’ menu
• Click ‘Safe Mode with Networking’
• Remain disconnected from the internet

Step 4: Delete any temporary files

Next, you need to delete any temporary files using ‘Disk Clean Up’.

Here’s how to do this:

• Click the Windows logo on the right bottom
• Type “Temporary Files”
• Choose “Free up disk space by deleting unnecessary files”
• Find and select “Temporary Internet Files” in the ‘Files to delete’ Disk Cleanup list and click OK
• Confirm “Delete Files” selection

Some viruses are programmed to initiate when your computer boots up. Deleting temporary files may delete the virus. However, it is not safe to rely on this. To ensure you rid your computer of viruses, it is wise to complete the following steps.

Step 5: Run a virus scan

Now it is time to run a virus scan using your chosen anti-virus or internet security software. If you are using Kaspersky Internet Security, select and run ‘Scan’.

Step 6: Delete or quarantine the virus

If a virus is found, it may affect multiple files. Select ‘Delete’ or ‘Quarantine’ to remove the file(s) and get rid of the virus. Rescan your computer to check there’s no further threats. If threats are found, quarantine or delete the files.

Step 7: Reboot your computer

Now that the virus is removed, you can reboot your computer. Simply turn it on as you would normally. It no longer needs to be in ‘Safe Mode’.

Step 8: Change all your passwords

To protect your computer from further attack, change all your passwords in case they were compromised. This is only strictly necessary if you have reason to believe your passwords have been captured by malware, but it is better to be safe than sorry.

You can always check the virus’s functionality on your anti-virus vendor’s website or with their technical support team if unsure.

Step 9: Update your software, browser and operating system

Updating your software, browser and operating system will reduce the risk of flaws in old code being exploited by criminals to install malware on your computer.

Removing a computer virus from a Mac

If you use a Mac, you may be under the impression that your computer cannot get a virus. Unfortunately, this is a misconception. There are fewer viruses that target Macs compared with the many that target PCs, but Mac viruses do exist.

Some Mac viruses are designed to trick users into thinking they are anti-virus products. If you accidentally download one of these, your computer may be infected. Three examples of Mac viruses of this type are ‘MacDefender’, ‘MacProtector’, and ‘MacSecurity’.

If you think your Mac has a virus, here are six steps to follow to remove it:

• Quit the application or software that seems to be affected.
• Go to ‘Activity monitor’ and search for known Mac viruses such as ‘MacDefender’, ‘MacProtector’, or ‘MacSecurity’.
• If you find one of these viruses, click ‘Quit process’ before quitting ‘Activity monitor’.
• Next, go to your ‘Applications’ folder and drag the file into your ‘Trash’.
• Remember to empty the ‘Trash’ folder afterwards to permanently delete the virus.
• Now make sure your software and apps are up to date to benefit from the latest security patches.

To ensure nothing is missed and to keep your Mac protected, consider installing a running an anti-virus solution if you do not already have one. We recommend comprehensive internet security solution like Kaspersky Total Security.

What is a computer virus?

A computer virus is a type of malware (malicious software) designed to make self-replicate, i.e. to make copies of itself on any drive connected to your computer.

Computer viruses are so-called because, like real viruses, they can self-replicate. Once your computer is infected with a virus, this is how it spreads. When a computer virus infects your computer, it may slow it down and stops it working properly.

There are three main ways that your computer may have become infected with a computer virus.

The first way your computer could become infected from removable media, like a USB stick. If you insert a USB stick or disk into your computer from an unknown source, it may contain a virus.

Sometimes hackers leave infected USB sticks or disks in people’s workplaces, or public places like cafes to spread computer viruses. People sharing USBs may also transfer files from an infected computer to one that isn’t infected.

Another way your computer become infected with a virus is through a download from the internet.

If you are downloading software or apps to your computer, ensure you do so from a trusted source. For example, the Google Play Store or Apple’s App Store. Avoid downloading anything via a pop-up or a website you do not know.

The third way your computer could become infected with a virus is if you open an attachment, or click on a link, in a spam email.

Whenever you receive mail from a sender you do not know or trust, avoid opening it. If you do open it, do not open any attachments or click on any links.

How to tell if your computer has a virus

There are numerous signs to look out for that indicate your computer may have a virus.

Firstly, is your computer slowing down? If everything is taking longer than usual, your computer may have become infected.

Secondly, look out for apps or programs that you do not recognize. If you see an app or a program appear on your computer that you do not remember downloading, exercise caution.

It is a good idea to uninstall any software you do not recognize and then to run a virus scan using anti-virus or internet security software to check for threats. Pop-ups that appear when your browser is closed are a tell tail sign of a virus. If you see these, take immediate action to remove the virus, by following the steps outlined above.

Another sign that your computer may have a virus is if apps or programs on your computer start behaving strangely. If they start crashing for no apparent reason, your computer may have a virus.

Finally, a virus may cause your computer to start overheating. If this happens, investigate whether you have a virus using anti-virus or internet security software.

Can your computer become infected with a virus via email?

Your computer can become infected with a virus via email, but only if you open attachments within a spam email or click on the links contained in them.

Simply receiving a spam email will not infect your computer. Just mark these as spam or junk and ensure they are deleted. Most email providers will automate this (Gmail for example) but if any slip through the net, just mark them as spam yourself and don’t open them.

How to protect your computer from viruses

Here are some key ways that you can protect your computer from viruses:

• Use anti-virus software or a complete internet security solution, like Kaspersky Total Security. For your Android mobile, consider Kaspersky Internet Security for Android.
• Research apps and software by reading user reviews.
• Read developer descriptions before you download apps and software.
• Only download apps and software from trusted sites.
• Check how many downloads apps and software have. The more, the better.
• Check what permissions apps and software ask for. Are these reasonable?
• Never click on unverified links in spam emails, messages or unfamiliar websites.
• Do not open attachments in spam emails.
• Keep software, apps and your operating system updated.
• Use a secure VPN connection for public Wi-Fi, like Kaspersky Secure Connection.
• Never insert unknown USB sticks or disks into your computer.

Why expose yourself to the risk of infection? Protect your computer with Kaspersky Total Security.

Kaspersky Internet Security received two AV-TEST awards for the best performance & protection for an internet security product in 2021. In all tests Kaspersky Internet Security showed outstanding performance and protection against cyberthreats.

Related articles:

• What is a Computer Virus or a Computer Worm?
• A Brief History of Computer Viruses & What the Future Holds
• Evolving Computer Virus & Malware Delivery Methods

Related Posts:

What is a virus (computer virus) ?(Opens in a new browser tab)

What are some common types of computer viruses?(Opens in a new browser tab)

FAQ Hacked WordPress Website(Opens in a new browser tab)

1.8 Million Users Attacked by Android Banking Malware, 300% Increase Since 2017(Opens in a new browser tab)

Understanding the Intersection of AI and Biological Threats: Navigating the Complex World of Viruses, Bacteria, and Cybersecurity(Opens in a new browser tab)