PC Needs Additional 55 Seconds to Power Off

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Bulldog17

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Sep 27, 2005
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Before my problem began: When I shut down my Windows 8.1 x64 PC, after Windows finally quit, the PC powered off within a few seconds.

Now: When I shut down my PC, after Windows finally quits, it takes 55 seconds for my PC to power off. (Timed it twice.)

It's not a driver issue or a software issue or a Windows issue, because the problem happens /after/ Windows has quit.

I tried replacing my HDMI cable with another HDMI cable - same problem. I tried replacing my HDMI cable with a DVI cable - same problem.

Recently I replaced the stock (OEM) power supply in my PC with a new Corsair power supply. That's the only recent change to my hardware.

Why does it take so long for my PC to power off?

Some additional information that may (or may not) help: When I restart my PC, it takes the same amount of time (55 seconds) for the OEM splash screen to appear, whereas previously the splash screen appeared almost instantly. During these 55 seconds I can see that my monitor is not getting a video signal. After 55 seconds, it gets a video signal and bootup continues.
 
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Another issue could be that maybe the new PSU has some sort of power saver bit. I know mine has a switch on it for like hybrid mode or something, not sure I've ever noticed a difference boot times though.
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gizzard1987

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Another issue could be that maybe the new PSU has some sort of power saver bit. I know mine has a switch on it for like hybrid mode or something, not sure I've ever noticed a difference boot times though.
 
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Bulldog17

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I appreciate your help. I also suspected this setting. However, when I looked in Power Options there was no tickmark, i.e., fast startup was not enabled.
 
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Bulldog17

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Thanks for your help. I also suspect the power supply, so I will ask Corsair about it.

Other hardware possibilities are the graphics card and the monitor.
 
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gizzard1987

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You might not need to contact Corsair, if you check the manual, there should be a picture of your PSU with lines going to labels. If there is a Hybrid mode or some sort of power saving switch. As far as the power options, depending on the PC, sometimes you have to change the fast boot in the BIOs.

EDIT: If there is a switch, and you want to try this, make sure you UNPLUG the cord from the PSU, after shutting down, and hold the power button on your case to drain all power from the rig. Some motherboards have LED lights indicate power to certain parts of the mobo, I use these to help me make sure it's powered down completely.
 
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Bulldog17

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I found the solution...and it's nothing we could have guessed. My computer was hibernating!

This was very strange, because I turned off hibernation in Power Options. Nevertheless, I saw a hiberfil.sys file in my C: drive!

This time I disabled hibernation from the command line and that solved my problem.
 
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Bulldog17

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Sep 27, 2005
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It was very strange...Hibernation was disabled in Power Options, so was Hybrid Sleep. But apparently, Windows 8.1 decided to hibernate anyway.

In retrospect, the 55 second gap between Windows shutting down and the computer powering off was being used to write the hiberfil.sys file.

Once I disabled hibernation from the command line, the problem went away.
 
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