I ahve donwloaded a virus check software program through limewire and it has caused major problems and I cannot access the pc. Windows XP pro is running and I get logged in the screen goes black appears and then goes to a blue screen and starts a dump of physical memory. It will not allow a start in safe mode and last known good start just takes me back into the loop. I have to switch the oc off at the socket to get out of this. I have no reboot disc only the windows xp. Any ideas?