HOw long have you been running the PC? Is it really hot to the touch (heatsink, air charge is very warm)? If not, then the software's buggy. Reinstall it or download a newer version.
If you're running this long on the PC and it hasn't shut down on it's own yet or random reboots, then it's probably false reading. Get like an Everst program of Sisoft Sandra to tell you temp. too to compare.
*Fact: Microsoft Window's Blue Screen of Death vs Computerforums.org's White Screen of Death. Which is worse?