Ok, I'm new here so I'll try to give you as much info as possible. So I was running vista fine until it started to get extremely slow to boot, and eventually wouldn't boot at all. I erased the partition and tried to install it again. Even at the black loading screen on the installer disk after "Windows is configuring files" or whatever the same would happen. So now I created a bootcamp partition and used it to back-up everything with time machine. Restored my mac, updated everything, restored and erased partition(btw each partition I made was 100 gig). Tried installing it again, STILL get the black screen. I also noticed that each time in the black screen, the green bars that would run across the box in the middle of the screen would eventually slow down if you waited long enough, as if some kind of lag was there after waiting awhile. Oh and right before vista started acting weird, I installed a ton of programs I needed, but maybe one of them was a virus or something? But I don't think that matters because I erased my whole partition completely. I have tried everything I know, please help! EDIT: I tested this on my vista laptop and it loads, so its the mac, not the install disc.