Hi! I just installed windows 7 ultimate 64bit on my iMac i7 and now when I start windows it first says "windows is starting" like it should do but then the display turns black and I can't do nothing else than press the power button for a couple of seconds so it will be forced to shut down. has anyone an idea to how I could fix this problem? it seems that there is something wrong with the display drivers but how am I supposed to install new ones without seeing what I'm doing.. please help!!