I am running latest build in Fast Ring insider preview of Windows 10. Wanted to create some power profiles for Max Graphics and Max Battery(limiting CPU) After disabling CSenable via registry and reboot edit the balanced profile to Max Performance on GPU for ACPOWER and then reverting csenabled registry on reboot I keep getting BSOD system service Exception error. Only way to fix is fresh install. Have tried 3 times on this build of win10 and keep getting error. Worked on previous builds any ideas?