Computer issues!!!

Hi everybody! As you may have noticed, recently i haven't been playing much or for very long. This is due to the mysterious turning offs of my computer. It turns off randomly, and once off has troubke turning back on unless waiting awhile. I thought it was heat related, but it doesn't appear so any more. Till i know what is going on or i can get a new cpu, i'll try to play when i can, but when i randomly log, you know what happened.