I never trusted those programs either. Try formatting only your windows drive. If it fixes the problem, you are lucky because you can retain all the data you have on the other drives. But if it doesn't go even after that, format your whole pc. That will definitely get rid of it. If you have any external storage devices (flash, external hdd, etc), connect it to another pc before your own. If it has a virus, format it as well, then connect it to your pc. Or, like i said, get Norton 360 for "cheap". I can PM you a link if you need.