Hi guys, I just realized that a lot of computers are still infected by the worm, so I made this short guide to help anyone out. Suggestions, comments, and corrections welcome!
What is Conficker?
Conficker is a computer worm that targets Windows, and currently (as of April 21, 2009) infects the largest number of computers worldwide since the SQL Slammer worm of 2003. The goal of this worm, if any, remains unknown, but security experts agree that the vulnerabilities Conficker creates can allow someone else to gain control of a computer for their own purposes.
Why is Conficker Dangerous?
To protect itself from removal, Conficker disables the security systems of a computer it infects. Examples include preventing anti-virus programs from accessing their update servers, disabling Windows Update, and keeping anti-malware programs from running. Left unchecked, older versions of Conficker actually update themselves to more capable—and dangerous—versions.
This represents a clear and present danger for any computer infected by the worm. Aside from any potentially destructive effects of Conficker itself, the computer also remains vulnerable against viruses, other worms, and all sorts of malware.
How do I Remove Conficker?
Last October, Microsoft released a patch designed to protect a computer running Windows from the Conficker worm. Before the patch can be safely and effectively applied however, anti-virus or -malware programs should be run to ensure that the worm is not present in the system, or to remove it if it is present.
Luckily, thanks to the publicity generated by the worm, there are numerous anti-Conficker tools available, accessible by Googling "Conficker removal tool":