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.

Looking for a new antivirus? My tried and tested favorites will improve the security of your desktop PC, laptop, and mobile devices.

Both Avast and Bitdefender originally built their reputations on their high-quality, free solutions. Even though they've both grown into professional-grade security companies, they still offer ...

CNET’s expert staff reviews and rates dozens of new products and services each month, building on more than a quarter century of expertise. Avira is a cybersecurity company known for its freemium ...