I have seen a similar problem many times. My solution is to re-install Windows. Because this is probably a virus which has not yet been recognised by the Anti-virus makers. So they couldn't have released an update to destroy the virus yet. Remember once Kazaa has been on your system, Windows needs reinstalling. I personally think that Kazaa is a sure fire ways of messing up Windows. I would never let it in 100 miles of my computer, no way!