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.
Is my computer infected with the Conficker worm?
Probably not. Microsoft released a security update in October 2008 (MS 08-067) to protect against Conficker.If your computer is up-to-date with the latest security updates and your antivirus software is also up-to-date, you probably don’t have the Conficker worm.
If you are still worried about Conficker, follow these steps:
1. Go to http://update.microsoft.com/microsoftupdate to verify your settings and check for updates.
2. If you can't access http://update.microsoft.com/microsoftupdate, go to http://safety.live.com and scan your system.
3. If you can’t go to http://safety.live.com, contact support at 1-866-PCSafety or 1-866-727-2338. This phone number is for virus and other security-related support. It is available 24 hours a day for the U.S. and Canada. For support in other countries, visit the Worldwide computer security information page.
How does the Conficker worm work?
Here’s an illustration of how the Conficker worm works.
How do I remove the Conficker worm?
If your computer is infected with the Conficker worm, you may be unable to download certain security products, such as the Microsoft Malicious Software Removal Tool or you may be unable to access certain Web sites, such as Microsoft Update. If you can't access those tools, try using the Windows Live safety scanner.
The above article is taken from Microsoft
http://www.microsoft.com/protect/computer/viruses/worms/conficker.mspx
