Running windows xp..on a Median PC...up until December 08 it was under full warranty, from October - December it has had a new Mother board, new hard drive, new fan, new RAM, basically all new internal gubbins :confused:... still the problem persists....after i have booted up and running for a good hour + everything just freezes unable to use mouse or keyboard have tried using different mouse/keyboard...also changed monitor cable & monitor all to no avail.....HELP!!!