One of the pillars of good PC custodianship is ensuring all your gear isn't running out of spec, which can cause slowdowns, crashes, and frustration. The chief culprit for something running too hot is ...

...without being run in Windows? I have a bootable USB drive with the latest Hiren's on it, and I'll be running memtest86+ overnight to test my RAM, but I don't know of any program for stress testing ...

It means your processor made a mistake in an operation. As Hinton says, this may or may not be heat related. If the processor is running within normal temperatures, then it is not heat related and you ...