Free Anti-Virus Tools

There are many free anti-virus tools, here are a few noteworthy ones:

McAfee FreeScan	FreeScan searches for viruses, including the latest known "in the wild" viruses, and displays a detailed list of any infected files.
Norton Utilities	world’s most trusted antivirus solution†. It protects email, instant messages, and other files by automatically removing viruses, worms, and Trojan horses.