How to keep HP dv6 cooler without losing processor power

-What is a BIOS? How do I access it? What is it useful for? Can I modify it? Should I modify it? Benefits from modification? anti-benefits?
-how to cool down hp dv6 PC; I understand that one could downgrade the BIOS; I understand that an F16 downgrade for hp dv6 would be good at keeping system cooler. Is this really the case?

Wikipedia:

BIOS - Wikipedia, the free encyclopedia

You access it using a hotkey during startup. I believe that it's F10 for the HP machines. (On a Dell, it's F2. Asus motherboard, delete key.)

You might do better to go to the Windows control panel labelled Power. You may be able to set a scheme that will make the notebook run cooler when it's not using the CPU heavily.

As fars as I know, there's no way to make the machine run cooler without losing performance when the CPU is being max'ed out.

It's possible that reverting to an older BIOS might help if HP has screwed up the one that you have, but it's not what one usually expects.