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.

What Is a Computer Virus? A computer virus is a program. Like other programs, it’s defined by what it does, and the big thing a virus does is replicate itself. The virus exists as a collection of ...

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

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Computer viruses can invade your system without you noticing, disrupting its operation and even stealing your data. To protect your device, it's important to know how to recognize signs of infection, ...

As malware, ransomware, phishing, and AI‑enabled scams continue to grow in frequency and sophistication worldwide, the demand for layered, intelligent Windows antivirus has never been more critical.

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