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I am turning my Windows 8 box into hibernate for night. But at morning I am finding it wake up. I know I can use trial and error method to find what is turning it on. But is there any registry, which remembers wake up signal, which woke up a computer this time?

Dims
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  • This question provides some tips: [How do I prevent Windows 7 laptop from waking up automatically?](http://superuser.com/a/304940/289138) – and31415 Jun 07 '14 at 10:23
  • You might also want to [disable wake timers](http://www.howtogeek.com/122954/how-to-prevent-your-computer-from-waking-up-accidentally/) to prevent scheduled tasks from waking up your computer. To see if you have any wake timers enabled on your system, use the command `powercfg -waketimers` – Vinayak Jun 07 '14 at 12:27

1 Answers1

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You can open a command prompt and run powercfg -lastwake.

You can do this in a batch file like this:

lastwake.bat (put it on your desktop for easy access)

powercfg -lastwake
pause

At the Wake Source it should state your wake-up source.

Rik
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  • I didn't know you about this command. I just tried it out and it works well. For anyone who gets `Wake History Count - 0` as the output of this command, it's because your computer hasn't woken up from sleep yet (e.g. reboot, powered up after a shutdown, etc.) – Vinayak Jun 07 '14 at 12:23