I had that problem with a virus too...Wouldn't allow me to update any antivirus software, wouldnt allow me to download any microsoft updates or anything, It was a huge pain in the azz. If you don't have that much installed already, I'd suggest reformatting again with your inet unplugged so you don't get infected while you're getting up and running. And as cranky told me to do, Burn a disc with AVG on it(i can upload a link for you, I'll post it later) and install that before you plug in your Ethernet cables. As soon as you do, Update and run a scan of every file that you want to put back on your hard drive, which could easily be the way you got infected. good luck with all of that.