Microsoft: Protect yourself from the Conficker computer worm
The Conficker worm is a computer worm that can infect your computer and spread itself to other computers across a network automatically, without human interaction.
Rogue Anti-Virus Software Explained
Rogue anti-virus programs usually appears in the form of a fake Windows warning on your computer system that reads something like, you have a specific number of viruses on your computer (usually in the hundreds) and that this software has detected those viruses. To get rid of these viruses, you're prompted to buy the full-version of the antivirus software (which is really rogue antivirus software).
SOPHOS: Conficker Removal Tool
Unpatched computers are still at risk of infection, as it spreads by exploiting these computers, weak passwords and USB storage devices.
Webopedia's "Did You Know?" Article
The Difference Between a Virus, Worm and Trojan Horse.
