A couple of months I completely removed mac of my computer to reinstall it for a reason which I can't remember, only to find that my disc had been snapped in half so I couldn't re install it. I received my Mac OS X Snow Leopard V10.6 Retail Family Pack in the post this morning (My iMac originally came with V10.6), unpacked, inserted it into my computer, tried to boot. The apple logo came up with the little loading sign, after about 5 minutes of waiting the screen goes grey and a notification comes up saying something like "You need to restart your computer". Done that, tried to re-boot the disc and it done it again. Tried five times and it still done it! My computer recognizes the disk, and it recognizes it in windows. I just used the disk to re-install bootcamp in windows to see how it goes, and it installed fine so I don't think there's a fault in the disk. Does anyone know what's wrong or what I can do? Thanks you.