Riki, Make a backup of your files, restart your computer, put your Windows installation disc in, press "R" before the Windows boot logo appears. Delete your hard drive thing, and create a new one. I did that. Then re-upload your files that where backed up. If you know what files the virus is hiding in, then delete it, and empty the recycle bin, then re-scan your PC for viruses.
Try that
EDIT: ^ He means, when the man repaired your computer, he re-format the hard drive. (I think)