Sounds like infinite loop error to me. I had that problem when using one of my emulators. It's usually caused by conflicting components. (Usually motherboard and GFX card). Try installing the latest GFX drivers for your card and maybe change the AGP/PCI/PCI Xpress speed in the BIOS. If that doesn't work, then its probally the processor overheating but I won't bother going into that since I would just be reiterating whats already been said.
That problem is a real pain and I hope you can sort it out!
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If a man AAA's Paranoia Survivor Max (Oni) and nobody is around, does he make a sound?