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.

Just because you have antivirus software installed on your PC doesn't mean a zero-day Trojan can't steal your personal data. The best encryption software keeps you safe from malware (and the NSA).

Dianna Gunn built her first WordPress website in 2008. Since then, she's poured thousands of hours into understanding how websites and online businesses work. She's shared what she's learned on blogs ...