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. Our team tests, rates, and ...

In 2025, most devices feature built-in antivirus software that scans files you attempt to download, blocking anything it deems suspicious. Antivirus tools also perform automated scans to remove ...

Discover the best antivirus programs for computers that keep you protected without slowing you down. Best Antivirus Software ...

CNET’s expert staff reviews and rates dozens of new products and services each month, building on more than a quarter century of expertise. AVG offers freemium antivirus software with an impressive ...

What is antivirus software and do you still need it in 2026?

Black Friday 2025 is almost here, and early deals are already live across security software, online courses, system administration tools, antivirus products, and VPN services. These discounts are ...

Mike De Socio is a CNET contributor who writes about energy, personal finance, electric vehicles and climate change. He's also the author of the nonfiction book, "Morally Straight: How the Fight for ...

A phone displaying the Microsoft Defender logo, with the product page for Microsoft Defender Antivirus for Windows in the background - T. Schneider/Shutterstock Antivirus software is simply essential, ...

Over 300,000 new types of ransomware and other malicious software are discovered daily, according to the IT security research institute AV-TEST. Computer viruses can slow your devices, create a slew ...