Quote Originally Posted by FabianN View Post
Best case scenario:
could be the fan.


Worst case scenario:
could be the hard drive(if so, you're ****ed sooner or later and I'm amazed it's still alive)
OR a terrorist rigged his laptop with one of them car bombs...

RUN!!! RUN FOR YOUR LIFE!

Otherwise, like the others have suggest it is most likely your fan or your hard drive. If you can't take it in to get fixed try to buy the engineers manual (usually found on ebay) and attempt to diagnose the problem youself.