The Best Way to Check Your PC for Malware

When you think of a computer infected with malware, you may imagine flashing pop-ups all over the screen or other obvious signs. And while it can happen today (as with ransomware), most modern computer attacks are more sinister and subtle. They want to avoid detection so they can capture your sensitive information and otherwise play the long game.

Still, you might suspect malware if your PC suddenly runs slowly, freezes more often than usual, or you notice strange processes running. Whether you think your computer has a security issue or just want to run a scan for added peace of mind, it’s not difficult to scan your PC for malware. You can also get multiple reviews from different tools.

Windows 11 has built-in protection through Microsoft Defender, an antivirus tool that is part of the Windows Security following. Search for this app using the Start menu to see everything it has to offer. Each icon will display a green check mark if everything is OK; If there is a problem, you will see yellow or red warning icons depending on their severity.

For our purposes, the Protection against viruses and threats The section is the most relevant. Microsoft Defender is enabled by default and scans regularly for threats, with details of the latest one at the top. Click Authorized threats to see flagged items that you have approved; If you see something here that you don’t recognize, it may give you an idea of ​​problems on your system. Also check the Protection history tab, which records when Windows Defender takes an action.

Defender’s quick scans only look at “places where threats are commonly found.” To go further, choose Scanning Options followed by Full Scan > Scan Now. This may take a while depending on how many files you have on your system. THE Microsoft Defender Antivirus (Offline Scan) The option restarts your PC to place it in the Windows recovery environment, where a scan is more likely to detect malicious threats trying to hide. Try it if something is still wrong after a full scan.

Also in Windows Security, select the Firewall and network protection and make sure the firewall is enabled for all three connection types. Although you can get much more granular about which applications are allowed through the firewall, the default options (blocking incoming connections you haven’t given permission for) are good in most cases. Understanding how a VPN works can add another layer of protection to your connection if you’re interested.

Windows’ built-in security tools provide a solid foundation for blocking incoming threats and detecting those that get through. But it’s a good idea to have at least one other anti-malware scanner (not a second real-time antivirus) that can catch what Defender might be missing. One of the best is Malwarebytes, which I have used for many years. Its free version offers an on-demand scanner, which you can run when you suspect something or occasionally as part of your regular security checks.

As with Defender, you can make a Quick analysis To check the areas where threats most often reside, a Custom scanning to choose exactly where the tool searches or a In-depth analysis for a comprehensive overview that will probably slow down your system for a while. If Malwarebytes finds something, it will alert you and give you options to deal with the threats (like quarantining or deleting them). Malwarebytes also offers a separate free tool called AdwCleaner, which focuses on adware and similar junk files. It’s worth a try if you’re fighting something that other tools haven’t been able to remove.

If you want more proactive protection, Malwarebytes offers several paid subscriptions that provide real-time threat protection, as well as scam-blocking features in your browser (and more for higher-tier plans). While these can help, they’re usually not necessary if you browse carefully, as we’ll see in a moment.

If you need to go further in your fight against infection, there are other options to try. Entering Safe Mode on your computer before running scans (with any anti-malware tools you have installed) can be helpful as it is a simplified environment without a network connection. Microsoft also updates and runs its Malware Removal Tool every month, designed to detect and remove common forms of malware. To run it manually, tap Win + R To open the Run dialog box, enter “wrt” and confirm the UAC prompt to open it.

Other second opinion tools include ESET Online Scanner and Emsisoft Emergency Kit. VirusTotal is also a powerful add-on tool to check files or web pages for infection.

You definitely don’t need a third-party antivirus to replace Windows Defender. Although these tools can provide good protection for free, most show constant pop-ups asking you to upgrade to the paid version, which is not necessary. Subscription plans add extras like password managers and VPNs, but you can find free or better tools elsewhere. Microsoft has a natural incentive to keep Defender strong: if it does a bad job, Windows is less secure by default, leading to bad press and fewer people wanting to use it. In contrast, third-party AV companies mainly make money when you upgrade.

If scans from Windows Defender, Malwarebytes, and any other tools you run come back negative, your PC is probably clean. Looking ahead, it is always better to keep threats away from your device rather than having to clean them. Be aware of common attack methods such as random email attachments, questionable download sites, and fake security warnings.

It’s also worth remembering that antivirus tools can’t protect you against all digital threats. A Malwarebytes scan won’t prevent someone from accessing your Google account because you use a weak password, for example. Some security suites warn you if you open a phishing site, but they can’t know about all of them. And your PC protection tools can’t stop you from falling for a phone gift card scam.

Follow the crucial tips for online safety and hopefully you won’t often have to worry about removing malware or any other threats.