Good heavens, your CPU is running very hot. chrisbliss has eliminated the possibility of overclocking as far as I can tell (resetting BIOS to defaults), so now you have to work on your cooling! If the PC is no longer under warranty (and if it is, you should take it back!), have a read of
this article for cooling assistance. You may want to enlist the services of a technically inclined friend if you don't feel up to the tasks outlined.