So it's been a little while (Thanksgiving will do that :O) But I've done some more tests.

BIOS are now completely default, RAM is at Manufactures settings, all settings Default.

PC is 100% stable.

WoW still makes it lock up after only 1-2 minutes of only THREE accounts logged in now.

Someone mentioned my power supply. it's about 2 years old. I doubt that it is the problem as I can play MUCH more power hungry games like Battlefield 3, or Skyrim on Max settings(And then some for Skyrim) and they can run all day without a hiccup.

I'm beginning to lose my mind over this, I've run 3 accounts of WoW on my PC on High settings all day back in WOTLK, and I've had 5 Accounts logged in for about 15 minutes before as well (Friends account's just dicking around)

I just....I have no idea what can be the cause anymore, Defaulted BIOS, no indications of Hardware at fault, newest drivers...Nothing ever shows there is any indication of a problem until WHAM whole computer locks down.