On my Macbook it has windows 7 proffesinal 64bit, and I used boot camp to install it on a seperate partition on my hardrive. It installed perfectly and I had no problems. But, now ever time I try to boot into windows by pressing the alt key on my computer it just shows me a black screen with no curser. Any help on how to fix this? Also I would prefer not to reinstall windows unless have to. Thanks!