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.
If you are using older versions of Avast or AVG Antivirus, Microsoft has placed a compatibility hold that will prevent you from upgrading to Windows 10 1903 or Windows 10 1909 until you upgrade to a ...
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