M17xR4 Flashes at Windows login and then goes black

I have a M17xR4 with a 7970M and currently have an issue where it boots to windows (Using 8.1 64-bit), then briefly flashes the windows login page, and then goes black. I can boot into safe mode, and have tried uninstalling and reinstalling the drivers on my GPU. I also did a system restore which managed to boot regularly but I could not use the 7970M without the same thing happening at startup. Is my GPU cooked or is it possibly a software issue?

M17xR4 Flashes at Windows login and then goes black