answer:I would suspect these things: power supply RAM has become unseated in the sockets / mild corrosion on RAM sockets. hard drive connection / hard drive failure I’d try pulling the RAM chips out and reseating them first, when that’s the problem it’s so easy to fix it’s worth trying up front. The seasonal change in temp/humidity can cause RAM modules to shift out of whack. The symptom that it will crash in the first few minutes supports this possible cause, as maybe when the machine warms up a bit the RAM gets better contact. A power supply can start going intermittently. But I think that would be more likely to quit after the machine warms up. Hard drive connections can get intermittent, reseat the cables into the hard drive(s) at both ends.