before you give up. make a copy of all your files you want to keep.then take a look in the windows folders, temp folders, and programs files. there is are exe files in there that you have to manually delete. if, you delete the wrong files, you just entered reformat land! I cant even begin to explain which ones are keepers and which ones are problems. if your looking at fdisk then why not take a learn.
try this place. follow the instructions. if might help you out. all the stuff is free.
http://securitytango.com/
anyone tried linux lately?