Last night I tried to install Windows 7 via bootcamp on my MacBook and after the intalashion stalle dout on 95% for about an hour I cancelled out and removed the disk was all scratched to hell. It's like something is in there just cutting a groove into the disk as it spins. I put in a black tonight to test it out and same thing happend. Anyone have any ideas on how to clean it out? Or should I write it off and get an external DVD drive? Also have to look into using one of those disk repair kits to salvage the Win 7 disk.