Protect your devices without spending a penny. Explore the best free antivirus software, with expert reviews and top picks for Windows, Mac, and mobile.

Want to keep your devices safe? These tried-and-true free antivirus tools can protect your computer, phone and other devices -- without breaking the bank.

Best Antivirus for Windows 10 (2025): Avast Awarded Top PC Security Solution by Software Experts PR Newswire NEW YORK, Aug. 1, 2025 ...

SEATTLE (AP) — Microsoft Corp. said Thursday it plans to release a beta test of its free computer security program next week and is on track to launch a finished product in the fall.The program ...

The security software will come as a free download, but it won't be part of Microsoft's Windows 7 operating system, which goes on sale in October.

Mark Russinovich was doing a routine test this week of computer security software he'd co-written, when he made a surprising discovery: Something new was hiding itself deep inside his PC's guts ...

Trend Micro Inc. <4704.T> said on Friday it is revamping its PC security software to reduce the amount of memory it uses to address customer complaints the product slows down their computers.