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.

Windows Defender is a capable antivirus solution built into Windows itself. Unless you’ve installed a different antivirus program on your Windows 11 or Windows 10 PC, your PC is using it right now.

Antivirus apps protect your PC's personal information, data, bank accounts, and other sensitive information. We've tested more than two dozen utilities to help you choose the right antivirus for your ...