The word 'virus' gets tossed around a lot. Here's what actually counts, what to watch for, and how to stay two clicks ahead ...

A computer virus is a type of malware that can replicate itself on your computer and spread to other devices.

A computer worm is a type of malware that, once it infects a machine, can automatically copy and extend itself to connected devices.

Discover the types of malware in 2025, from backdoors to ransomware, and learn which families hackers use most in real-world attacks.

If your default browser homepage and search engine keep mysteriously changing to Yahoo!, your computer is probably infected ...