I have this issue with a Windows XP computer that crashes all the time, for no apparent reason or pattern. It's a new OS installation and it did the same thing to some extent before I reinstalled Windows. It's probably a hardware error, but the only thing I can think of is RAM and memtest checks out fine. I also made sure that the CPU isn't overheating. It's a 2005-era Compaq PC with an AMD Sempron 64 2800+ and 2.5GB of DDR RAM. I attached an HTML report of all the minidumps, notice it's never a consistent bugcheck code or driver causing it.