It looks as if the virus deleted all file associations in the registry. I don't know of a simple way to fix that. A reinstall or repair of Windows should do it. Look up 'Windows Repair install' for instructions. You need a full install CD to do it. Your other option would be a system restore to before the infection, if you have any idea when it happened, and have restores available that far back. Failing any idea how far back to go, just restore whatever you have, to as early as you have.