So I've installed Windows 8.1 to an external harddrive (USB 3). Started by doing bootcamp method on my Macbook Pro Retina (256gb), then used winclone [app] to transfer the image directly to a external harddrive so I could then claim back the 20gb bootcamp partition. All of this above is fine, and the Windows side boots up fine in safe mode. However in normal mode windows will BSOD throwing an error about igdkmd64.sys. I think it's relating to Intel HD driver kicking in, as in device manager I see it suddenly appear everytime (in display category) just before the BSOD happens. However, the problem is I can't see the Intel HD anywhere in Safe Mode to disable it? Any ideas how to stop this happening, completely unusable atm? Help is appreciated .