I purchased one of the G750's this summer.
I kept getting intermittent Blue Screens from Windows 8. The error was: Driver Power State Failure
The only solution I have found was that the latest NVIDIA driver was causing the problem. The laptop is running the NVIDIA GeForce GTX860M.
When I reverted to the older driver and the blue screens stopped.
The latest driver: GEFORCE 344.11 DRIVER is not working properly. The driver that is stable on my system is: 332.60.
I will update this article when the newer drivers are released.