I have a strange problem with shutting down my computer with Win 8.1 64bit.
The computer shuts down, but the CPU fan and power led are still working and do not shut down until I pull the power plug or switch off power supply. I cannot shut it down even with pressing the power button for a number of seconds (power button is set to shutdown in BIOS). I have disabled fast boot and can see in Event viewer the computer actually shuts down completely and then performs cold boot (boot type 0x0). Drivers and BIOS are updated, there is maybe a possible problem with graphic card, Geforce 7600GT, for which I cannot find drivers for Win 8.1 64bit and am using drivers for Win 8 64bit (but everything works normally). If I remove drivers for it and use standard vga driver, the problem stays.
Even typing shutdown /s doesn't help.