hi, im new to this so sorry before i start. my computer tower auto restarts on a reguler bases, 1 person said its my mother board, then they said it could be my proccesor, someone else said it could be my graphics card, ive been through my device manger and nothing is showing as having any problems, my tower is 3 yrs old and ive cleaned my cpu fan with compressed air, but that hasnt made any differance, it can go a week without doing it, then it will do it 4/5 times in a day. it will do it when im playing a game, burning a disc, or just sat idle doing nothing. can you help please ? as im disabled and i rely on my computer.