Okay, I accidently crashed my Windows system because an update caused the O/S to crashed. I restarted the system formatted the drive, popped in the Mac OS X disk, and when the dvd is booting by loading the installation files, the installation exits and the system shuts down. I only encountered this once, and that was today, however, previously at times I would get the message of "you have to restart, etc" I don't understand, verbose mode shows everything loading fine. And I have installed Mac OS X with this disk over 10 times (exageration), and never encountered this problem. Is it the DVD? or what else can it be? help would be very much appreciated. =)