It does sound like a thermal issue to me, I was working on a computer earlier today which just randomly shut off whenever the person would rip a cd. There was no blue screen and now warning, just shut off. I checked using our temperature meter program and it was spiking in the 90s (celcius!).
I have been touched by his noodly appendage.
"I think we can all look forward to the time when these three theories are given equal time in our science classrooms across the country, and eventually the world; One third time for Intelligent Design, one third time for Flying Spaghetti Monsterism, and one third time for logical conjecture based on overwhelming observable evidence."