The best might be if you contact me by mail. There must be a solution for this which we could try to find in a icq session.
One more thing that you might try out before: As proposed somewhere else in the forum: Have you tried disabling the Hyper threading in the bios? Also make sure that no kind of energy saving is enabled in the bios and Windows settings.
Ah, and maybe its the same problem that MED had: Try do download a CPU temperature tool. Sometimes a tool for this is included in the software package that came with your computer. If the CPU overheats, it could cause things like this (and also crashes out of the blue).