If scanning with multiple antispyware programs doesn't remove it, try using Windows' System Restore feature (note that Windows 2000 lacks System Restore). Select Start, Programs (or All Programs), Accessories, System Tools, System Restore. Choose Restore my computer to an earlier time, click Next, pick the earliest Restore Point available on the displayed calendar, and follow the prompts.
Should System Restore fail to solve the problem, your next steps are to reboot your PC and press
If your PC is still infected after this, I must make like Dear Abby and recommend that you seek the assistance of a professional. Contact the support desks of your various security software vendors, one of which may have the solution.
try community approach, create a verus technical report on ur system's suspicious Windows behavior and post it on one of the the many web forums.
If all else fails, back up your data folders and get ready to reformat the PC's hard drive and restore your system from a full backup. If you don't have an image backup of your drive, you'll have to reinstall Windows, install and update your malware protection, and restore your data from the backup. See "Move All of Your Valuable Data to a New Partition" for a list of the folders that likely contain your data. Instead of moving the folders (as that tip suggests), copy them to CDs, DVDs, or an external hard drive.
Of course, reformatting and restoring your drive is easies