Antivirus.about.com
Your full-service guide to virus protection, detection and eradication. Computer security expert Guide Mary Landesman offers a continuously updated library of articles and resources.

CERT Coodination Center
Latest alerts and updates from the federally funded computer security research and development facility at Carnegie Mellon University.

McAfee Virus Information Library
From a premier antivirus software vendor, detailed information on where viruses come from, how they infect your system, and how to remove them.

Symantec Security Updates
Up-to-the-minute news on virus threats from another highly regarded antivirus software provider.