Computer issue: Itunes meets vista?

[Vad]

Maybe a failing power supply that is crashing when the power draw increases.

Also maybe a fan failure and the computer is doing it's protective shutdown to prevent heat damage.

That would suggest CPU/RAM/Motherboard heat problems. My GPU overheats and it just bugs out the monitor and/or fries like my old one. Never had heat problems with a hard drive so the safest route would be to add it to the list of possible heat issues.

The power supply theory sounds like the most valid idea though.