My PC is performing strangely the past 2 days. If my pc starts up with a normal boot, restart etc. everything is fine.

On the other hand if it is "fast-booting", the windows boot logo is displayed for a couple of seconds and then it powers off completely. After that it performs a normal boot. Which takes surprisingly long time for a system with an ssd. (Previous installation of windows 8.1 lead to 5 seconds boot time, now it is about 20).

Fast boot is enabled both in UEFI and Windows (10). Power plan favors performance. If pc specs are required I will edit my question.

I cannot trace the problem to its source.


In shutdown before fast startup, Windows stores the OS state on the drive, similar to hibernation (though without running application state) in hiberfil.sys. If that file were to be corrupted, it could prevent a subsequent fast boot.

Try temporarily disabling hibernation, either from the power options menu, or by opening an elevated-rights CMD dialog and entering:

powercfg.exe /hibernate off

This should delete hiberfil.sys, or allow it to be manually deleted.

Then re-enable hibernation with

powercfg.exe /hibernate on

Hopefully, that will fix the issue.

  • That did not resolve the issue. It is still powering off during fast-boot. I noticed that when it fails to startup and then tries to normal boot, I get a QCode 66 which indicates that this is a memory problem. However I tried reseating, changing slots etc. and other than the fast startup I have no other issues with my RAM. – Valamorde Apr 12 '16 at 10:33

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