o you have a worm then that was my thought but i wanted to make sure first its probable making hidden files
you can try to use Start --> Run ---> msconfig and look at whats starting with you commputer and turn some things off maby youll be lucky and the worms in there
also try sme online scans like
Start BitDefender Online Scanner because scanners that are on your computer are usless after you get a vires. sorry to say that vires noww a days almost cant be removed you can try to revert to a perviouse state on your computer be using system restor and or reparing windows with the CD other then that i would tell you to wipe it sorry