My HD stopped working, specifically that arm that slides across the actual disk (not sure the name of it) is clicking very loudly, and Im not sure why. There isnt anything physically blocking the arm but the tiny magnet in the back seems to be holding it back. Im not sure how to fix it or if its actually worth trying to fix, so Im looking for a new HD. Is there anything spefic I need to do before getting a new hard drive?? I assume the HD comes completly empty, so I have a CD to install XP. But im not sure if Im able to just plug in the new HD and go from there.