at first i tried to reformat but it wouldnt let me, so i re-installed xp, one thing i forgot to mention was that when i put my comp on it asked me for the back up disk, that was the only way i could get onto my comp by putting the back up disk in then windows would start, but it was still slow before all this happened, i have tried rebooting in safe mode and all i get coming up is "select boot service"