After I shutdown my new pc from the Windows shutdown option, the pc will restart on it's within an hour..usually much quicker. If it goes into sleep mode it seems to stay off fine. I disabled everything that I can think that could wake it but nothing should be able to wake from a OFF condition anyway?? It's not easy getting help from asus.
Asus mother board
Model P8Z77 –V Pro
Video mfg. Sapphire Radeon
Video card model HD 5450 1GB DDR3