I haven't come across Speccy before - clever isn't it?
I'm using the aforementioned laptop at the moment. 'Tis not that old (18 months ish). My mention of one shut down was wrong. I live on a farm, and hadn't spotted that I'd had a brief power cut! Which means that the bios update has cured it completely. The intarweb is awash with people complaing about heat in the HP Pavilion G7, and I'd virtually given up on a conventional fix when I just thought a check on the HP site might be worth a last shot. (The unconventional fix was going to be a big hole in the bottom with a man-sized fan in it).
This machine is also running way above 'stock core speed' occasionally, so mebbe just an average thing?
As to the bios and fan, I wonder it it's a protection in that if you're actually in the bios there is a chance that you could start a process that makes it run hot but the bios can't do anything about the fan whilst you have it open?