CMOS Setting for Laptop Fan

I’m new to this IT world and am trying hard to learn as much as possible. I’m getting ready for my CompTia A+ cert so I know a little, but am still just scratching the surface. My question is: I have a HP Pavillion zd8000 which run extremely hot, I checked out the fans and One out of the three are not running, a friend of mine told me it might be shut off in the CMOS. I tried to enter CMOS to check but it seemed pretty useless, maybe I wasn’t even in CMOS. I’m running windows XP Professional and I thought the F10 key on start up was CMOS, it did take me to set-up but that was lame and no real juicy settings to play with. Any advise would be greatly appreciated.