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.

ESET NOD32 Antivirus, the award-winning antivirus software, offers protection against all types of malware and digital threats such as viruses, spyware, worms, rootkits, exploits, ransomware and ...