Microsoft Defender isn't bad, but it's not enough to fully protect your PC. You don't have to pay extra, though—just use one of the top free antivirus apps we've tested.
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How to check for virus and protect your computer
Run full system scan If you suspect that you have a virus on your computer, use antivirus software to run a full system scan of your device. It's best to set your antivirus program to automatically ...
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