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.

ZDNET tested the best antivirus software on the market, with support for multiple operating systems, VPNs, and robust protection.

Avast has also been recognized by AV-TEST, an independent IT security institute, as one of the "best Windows antivirus software for home users" in their evaluation during May and June 2025, ...

Webroot - Its streamlined technology, efficient scanning, and powerful threat intelligence make it a highly recommended solution for maintaining strong PC security. The Software Experts evaluation ...

Firmware is the low-level software that is deeply integrated into the hardware of your device. It sits beneath higher-level software and your PC’s hardware and acts as a kind of bridge running the ...

SEATTLE -- 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 firewall is one of the most important security features in a computer environment. In the classic sense, a firewall is set up on an appliance, such as a computer that fulfills just a single, ...