Just out of the box last night. Starts up and the hard drive 500GB is making tons of noise. Sounds like the arm is smacking back and forth, grinding sounds, and electronic like sounds. After twenty minutes or so it died down. I rebooted. The entire time Spotlight was indexing it was loud and noisy. Once completed it was nice and quiet again. I moved some things around and it got noisy, at that point I just went to bed. This afternoon I ran all the updates, it went back to noisy all over again. In my opinion the HDD is most likely no good, or will be no good sometime soon. I've got an Apple Store about 10 minutes away, is this worth making an appointment or will they just give me 'it boots and runs, what can we do until it dies'?