I had Windows Vista on my computer and wanted to upgrade to Windows 7 and thought that I would format my computer since it had been awhile. When I installed Windows 7 it wouldnt let me it would go through all the installation and then when my computer rebooted it would just be black screen with my mouse, I have tried mulitpule times now, and have just gone backs to Windows Vista, this no longer works and does the same thing as when I tried to insta I have a Nvidia GTX 275 video card, ASUS m2N-E SLI mother board,and a AMD 5200 Dual core processor