Can someone please shed some light on this problem? I have a Core Duo MacBook Pro with Leopard installed and Windows Vista Home Premium. Once Windows Boots and the drivers start loading, immediately once the keyboard manager starts loading, my MacBook Pro turns itself off. I need to turn the computer on and then again, it turns off. After the third time, I turn the computer on, it finally starts. This is getting quite frustrating, as I need to use Windows on my machine, and getting started can take up to 5 minutes. I have re-installed both Leopard and Windows Vista twice and I still have the same problem. I have worked out to be the keyboard manager conflicting with something, but I don't know what. Can someone please help?