Freezing while gaming. "Driver Power State Failure"

It seems to happen with more demanding games. Desktop, internet browsing and less demanding games it works very well, but during games such as Portal 2 or Skyrim it freezes my entire computer. When I try to ALT+TAB out it either goes to a blank screen or it just doesn't do anything at all. I usually have to force restart my computer in order to get it working properly again. Anyone have any ideas on what I should do next?

Note: I already ran the BSOD tool and attached the zip. View attachment 63406

Note 2: My PC's name is cooler than yours

try this : Wagnard Tools then download DISPLAY DRIVER UNINSTALLER.
it ask you to reboot in safe mode when u launch the software, so reboot
then clean and uninstall your graphics card driver ,then install the latest one which can be found in the manufacturer website like nvidia,intel, or amd. or try this vid: https://www.youtube.com/watch?v=NiAbYY9U998