I recently had Windows 7 run some updates (one of them was the windows 10 app) when they completed my boot camp drive was missing from Startup Disk. I can still access windows via holding down alt at startup. This wouldn't be a big issue if it weren't for the fact that I have to install the original GFX card (X1900) to get the boot loader screen to show. As I use Win7 for games this is not a permanent solution. Alternate solution would be a way to get my GTX570 to show the boot loader screen. The hard drive still shows in OSX but not as a bootable drive. I can access it and see all the files but that is it. I am running: Mac Pro 1,1 2 x 3Gz Xeon OSX 10.7.5 Any help would be greatly appreciated. Thanks!