How to Find and Remove Viruses from Your Windows PC or Mac

Despite our best efforts, sometimes viruses and malware still find their way onto our computers. With over 560,000 new pieces of malware being detected every day in 2024, the threat is greater than ever. Hackers want to steal your data, bombard you with ads, trick you into installing fake software, or just disrupt your system.

If you suspect your computer has been infected, don‘t panic. With the right tools and techniques, you can detect and remove viruses to get your PC or Mac back to normal. Read on to learn the telltale signs of infection, step-by-step virus removal guides, and tips to avoid malware in the future.

Signs Your Computer May Have a Virus

Viruses are designed to be stealthy, so you may not notice anything is amiss right away. However, there are some red flags that can tip you off to an infection:

• Your computer has become very slow, even for basic tasks
• You‘re seeing a surge of pop-up ads, even when no browser is open
• Strange apps or programs have appeared that you don‘t recognize installing
• Your computer is crashing or freezing frequently
• You notice unauthorized changes like new desktop icons or different passwords
• Your email or social media contacts received messages you didn‘t send

If you‘re experiencing one or more of these issues, there‘s a good chance your system has been compromised by a virus or other malware. The longer it goes unaddressed, the more damage it can do, so it‘s best to take action quickly.

How to Remove Viruses from a Windows PC

Modern Windows versions like 10 and 11 come with Windows Security (aka Windows Defender) built-in. While it offers some basic protection, it may not be sufficient on its own, especially against the latest threats. For more comprehensive security, it‘s best to use a dedicated antivirus program.

Here are the key steps to clear viruses from a Windows computer:

Step 1: Install Robust Antivirus Software

There are many great anti-malware options for Windows. Some of the best choices that offer excellent protection are:

• TotalAV: Consistently earns high scores in third-party protection tests. Includes advanced features like real-time protection, anti-phishing, a VPN, password manager, and optimization tools.

• Bitdefender: Offers unbeatable malware detection paired with an impressive set of security extras like ransomware protection, parental controls, a VPN, and a password manager.

• Norton: A long-time leader in the antivirus space. Provides flawless virus protection along with a smart firewall, secure VPN, password manager, identity theft monitoring and more.

Once you have a reliable antivirus installed, make sure it‘s fully updated with the latest virus definitions. This ensures it can detect the newest malware strains.

Step 2: Reboot in Safe Mode

Some sophisticated viruses can interfere with antivirus scans. To prevent this, reboot your PC into Safe Mode before scanning. In this stripped down state, most third-party software (including viruses) is disabled, allowing your antivirus to operate unimpeded.

To enter Safe Mode in Windows 10/11:

1. Click the Start button and select the Power button
2. Hold down the Shift key and click Restart
3. Your PC will reboot to a menu. Select Troubleshoot > Advanced Options > Startup Settings > Restart
4. On the next menu, select option 4 to enable Safe Mode or 5 for Safe Mode with Networking

Step 3: Run a Full Virus Scan

Open your antivirus program and initiate a full system scan. This will check every file and process on your hard drive for signs of infection. Depending on your storage size, this can take a while, so be patient.

Once the scan is complete, your antivirus will alert you to any malware it found. Review the results carefully. Most antivirus tools will offer to automatically clean the infected files. If you‘re unsure about anything, quarantine it for further analysis.

After everything‘s cleaned up, reboot your computer to exit Safe Mode. Run one more scan in normal mode to confirm the system is clean.

How to Remove Viruses on a Mac

While less targeted than Windows, Macs are not immune to infection. macOS includes some built-in anti-malware tools, but they don‘t offer complete protection, especially against adware and potentially unwanted programs (PUPs).

To fully clean viruses off a Mac, follow these steps:

Step 1: Install Mac Antivirus Software

Start by choosing a reliable Mac antivirus program. Some of the best for virus removal are:

• Intego Mac Premium Bundle X9: Specifically designed for Macs, it offers excellent malware protection and an array of bonus security and performance features.

• Bitdefender Antivirus for Mac: Delivers unbeatable threat detection with a minimal performance impact. Also includes anti-phishing, anti-fraud, and adware blocking.

• McAfee Total Protection: Provides near-perfect malware identification powered by McAfee‘s Global Threat Intelligence. Includes a firewall, web protection, and file shredder.

Keep your chosen antivirus software updated to defend against the latest Mac malware.

Step 2: Quit Suspicious Apps & Processes

Open the Activity Monitor and look for any unfamiliar process names, especially those using high amounts of CPU or memory. Search online to see if they‘re associated with known Mac malware.

If you find any questionable items, select them in the Activity Monitor and click the X button to force quit them. Then go to the Applications folder, drag the suspicious app to the Trash, and empty the Trash to uninstall it.

Reboot your Mac and see if the problem persists. If the same apps reappear or your issues continue, proceed with an antivirus scan.

Step 3: Scan for Viruses in Safe Mode

Like Windows, Macs have a Safe Mode to run only the bare minimum of software. Viruses won‘t be active, making them easier to clean. To enter Safe Mode:

1. Shut down your Mac and wait 10 seconds
2. Press the power button, then immediately hold the Shift key
3. Keep holding Shift until you see the login screen
4. Log in to enter Safe Mode

Now open your antivirus app and run a full system malware scan. Delete or quarantine anything it flags as a threat. Restart your Mac to exit Safe Mode.

Tips to Prevent Virus Infections

Adopting some smart security habits can greatly reduce your risk of infection in the first place:

• Keep your operating system, apps, and browser updated to patch any vulnerabilities
• Never open unsolicited email attachments or click links in spam messages
• Only download software from official app stores or trusted publisher websites
• Be wary of Flash or Java installers that bundle extra software – uncheck any pre-selected "offers" before continuing the installation
• Use a secure VPN when on public Wi-Fi networks to prevent snooping
• Clear out your browser cache, cookies, and extensions periodically
• Back up your files regularly in case you need to restore after an infection

The Bottom Line on Virus Removal

Finding malware on your computer can be stressful, but it doesn‘t have to be the end of the world. By following the steps outlined above and using a robust antivirus tool, you should be able to clean your system and get back to work quickly.

However, antivirus software is most effective when it can prevent the infection in the first place. The real-time protection and web filtering offered by top antivirus brands can neutralize most malware before it ever reaches your machine. By combining a strong antivirus app with sensible browsing habits, you can dramatically reduce your chance of future infections.

When it comes to computer security, an ounce of prevention is worth a pound of cure. Stay alert, keep your defenses updated, and you‘ll be able to use your computer with greater peace of mind.