[ssupermegatone]

Those rogue viruses generally turn out to be a nasty rootkit or trojan, something along those lines. Obviously run antivirus on it, and then I'd recommend superantispyware and the like. If it still persists, there are some other tools out there that I've used in the past, but they're not for the faint of heart, as they can cause some serious issues if something goes wrong.

thanks