I have 2 Mac Pros (2009, 5,1) that work great with Windows 7. Installed Windows 10 on the first and get black screen after the video driver updates to nvidia drivers. Safe mode back to Basic Video Driver and stop updates lets me back into. Installed 10 on second Mac Pro, same issue. Black screen after video driver updates. Back to Basic Driver and back in. First Mac has a GT120 and the second a 8800GT. Both nvidia so is that the problem or something else? I have tried different drivers and get the black screen. Any help is appreciated.