Go change some stuff in the BIOS and see if you can fix it.
Mess around with the BIOS, press f5-f12 during loading, one of them might work, then try all the options, it might get you into the BIOS settings, with it's pretty blue screen,
Ever considered an external fan?
I got a loving irritating virus recently and it tweaked my computers overheating shutdown from 120°F
If it is hardware related then certainly check all the fans in the computer are running by opening the case during operation.