I've installed Windows 8 on to my MBP by wiping the entire internal HDD and installing from a disc (8 Pro x64). Holding option while booting only shows "EFI Boot". If I select it, I get the Windows logo with the indeterminate progress indicator for a few seconds, then an entirely blank screen. The backlight isn't on and the brightness keys are unresponsive (due to lack of drivers I guess). The audio-out jack is outputting optical audio like Windows normally does when there are no audio drivers. Eventually it just reboots. If I boot in to OS X I can see that of the 3 partitions created by the installer, the last contains 15GB of data, so Windows is definitely installed. Even more odd, If I start the mac without using option to choose a partition, I just get a prompt to insert a bootable disc (no Windows logo or spinner). Anyone have any ideas? I installed the Dev preview a while back in exactly the same way and it installed fine on the first attempt.