Yesterday, my Macbook Pro was bumped onto the carpet from my bed. Ever since then, the fan has been quietly running all the time.-Which is fine, it keeps my laptop cooler. The only problem is, when logging in, or launching applications such as Photoshop and iPhoto, my computer makes a grinding noise. Not a super loud one, but a grinding noise all the same. What does that come from? Should I be worried? ps: when i clicked "new thread" to create this- it made that same noise.