I'm trying to restore my Macbook to factory defaults and I can't get the disk to boot and am having trouble. Whenever I load the disk in and restart holding c, the disk spins and then spits out and the computer boots to Mac OS X (Leopard). I've reset the nvram, the pram, repaired permissions with no success. I used to have Bootcamp installed, but I read that may cause problems so I uninstalled it and it still won't work. These are the disks that came with the computer when I bought it new a few months ago so I know they work. Any suggestions?