Ok so I have a 13" MacBook from 2008. A while back I got the folder sign when I turned on my laptop, so I bought a new hd, put it in, then tried to install os x with the first install disk. When I insert the disk and held c, nothing happened. I got the apple sign, then it shuts down. When I insert the disk and hold option, I get a square with a disk in it and an arrow, when I click on the disk, the computer shuts down and starts up over and over with nothing else happening. Where do I go from here? I've honestly seen no other posts anywhere where this happens.