Laptop heat

A friend as an Alienware Sentia 12" laptop. The problem lies in that the laptop shuts off randomly it seems. I checked the laptop an it runs HOT when I say HOT I mean temperatures reach a max of 92 degrees celcius. The problem is that it reaches those temperatures even with little load.

I am wondering if the temperature build up can come from the HDD since it's a 7200rpm. And i wonder if switching to a 5400rpm will make a big difference in the temperature department. Also I'd like to look at the bios to see if there's a automatic shutdown safety but can't manage to get into it. What is the stupid key you have to press for Alienwares. I tried all the "F" keys.

Thanks for any help.

Thanks for the tip. I'll see what i can do. Don't think it's a fan problem since it works (I can tell by the sound)