Alright so I am going to try and make this as detailed as possible. I run on a MacBook Pro Intel based. 10.5 Leopard. I needed to wipe out my hard drive and restore my mac to the factory state. I got some instructions on the apple website and I followed them perfectly. here is exactly what i was told to do and this is what i did do. I inserted the restore cd that was in the box along with my mac book when i first bought it. then when i restarted it i pressed "C" this triggered it to load from the cd that i had put in. the apple logo came up with the spinning dial underneath it. I selected English and clicked continue. then I picked Erase and Install. The screen came up and said checking dvd to see if its stable something like that. after that completed it began installing. the bar only moved a little bit and my mac shut off. i tried again and the same thing happened. Can someone please help. Thanks