Actually I just got back my PC, they replaced the whole thing except for the HD. I was able to determine that the HD Noise that I thought I was hearing when doing various thing such as games was in fact NOT the HD. I took apart the computer and listened and it turns out it's coming from the heatsink/CPU area! The new PC does the exact same thing, so I think it's a design "flaw" with the laptop. If you have Morrowind launch it and listen to the back right of the laptop and see if you hear all sorts of weird noises. It's very very obvious on mine.
P.S. I'm guessing the problem is lack of good shielding causing interference which in turn causes the strange noises that get louder the more graphically intensive the program I am running.