Current status overload detected

My mobo is an asus sabertooth p67 rev 3.0
i72600 and 16gb ram
psu 750 w

So i decided to updrade to windows 8 from windows 7.. after installation when i hit power button my pc turns on and then turn off.. then i turn on again and the message "current status overload detected, system shutdown after 15 seconds" is displayed.. then i turn on again and load windows normally..
i tried disconnecting, mouse, keyboard, audio, front panel usb but same problem.. (case phantom nzxt)
i updated bios, chipsets, videocard (radeon 6870) and audio.. still the same problem..

I dont know if this is a hardware or software issue.. any help will be greatly appreciated!!