I got Windows 7 Ultimate and installed it on my Core i7 imac. The first installation process went well. After a few reboots, it boots back into windows 7 and the boot up screen goes up. After THAT, the whole screen is just completely black and nothing pops up. I've done this about 10 times and all the time, nothing happens. I even left it alone before I went to school, but still. Just blank screen. What am I doing wrong? Am i supposed to eject the CD?