pressure changes can affect a bad motherboard, depending on what the capacitors are made of.
for what it's worth, that looks like approximately the correct number of svchost.dll files you should be getting. xp only uses about five, but that's through process explorer, not task manager.
this horrifies me. i've never heard of an issue that needed external heat just to keep the computer on.
can you tell us what the bluescreen errors are? that'd help a lot.you might have to tell your motherboard (through the BIOS) to keep the computer on after an error (aka, no auto shutdown).