Even if you dont have the worm, or dont know if u do, u can download this utility to check if u have the virus worm. Once it detects the virus worm, it will remove it and clean up the registry for you.
check it out at this site
http://fileforum.betanews.com/detail.php3?fid=1075249850
Win32.Mydoom.A Removal Utility is a utility that cleans a local machine affected by Win32.Mydoom.A. The tool will search for and terminate any worm processes found in memory. It will then scan all drives on the local machine and, if the worm is found, will fix any modified registry keys. It will also remove datafiles dropped by the worm