I'm not sure what the term is exactly when you can hear your hard drive working to open an application or loading different things -- I think its sometimes referred to as "thinking". Kind of like a grinding sound. Well I heard this sound all the time on my old PC. It seemed to be always grinding away at one thing or another. I have had my new Macbook Pro 13" for about two weeks now and it has run SILENTLY. I was really impressed. But recently, the hard drive has begun to make more noise -- I can tell when it is working on things. Like whenever I open up a program or am browsing the web, I can hear a light churn every once in a while. Especially when I'm in a quiet room. Some of my friends with newer macs don't seem to have this problem. Does anyone else have a noisy hard drive? Is this something Apple will fix? For the amount of money I spent on this baby, I don't feel like it should sound like a five year old PC.