Windows 10: How to stop PC from waking up at 3AM?

  1.    24 Mar 2018 #1

    How to stop PC from waking up at 3AM?

    Re-installed Win 10 after botched update, now it wakes up at 3 am every day.

    Cleaned Task Scheduler from what (IMO) was not needed. Still wakes up.

    Checked Power settings, don't see anything wrong. Minimum processor power was 5%, changed to 0%. Still wakes up.

    The last log - below. Bottom entry is when it woke up last time.

    Click image for larger version. 

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      My ComputerSystem Spec

  2. Caledon Ken's Avatar
    Posts : 10,567
    Windows 10 Pro x64 Build 1803
       25 Mar 2018 #2

    Hi almot109.

    Next time it wakes up could you run this command at command prompt(admin) or powershell

    powercfg -lastwake

    If should give you info on what requested last wake.

    See Wake Source in Windows 10 Windows 10 Tutorials
    Last edited by Brink; 25 Mar 2018 at 11:31. Reason: added tutorial link for more info
      My ComputerSystem Spec

  3.    25 Mar 2018 #3

    Lastwake didn't help because after it had waken up at 7am, it went to Sleep again 3 hours later. So Lastwake only shows this last press of Power button - when I woke it up again.

    Tutorial on Wake Source, results: Unknown Wake Source.
    System is set to Hybernate when I press Power at the end of the day, - for faster booting.
    Log - below.
    Click image for larger version. 

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      My ComputerSystem Spec

  4. Caledon Ken's Avatar
    Posts : 10,567
    Windows 10 Pro x64 Build 1803
       26 Mar 2018 #4

    Any chance you can catch it a 3:00 am?

    Additionally I think one night I would boot it clean and then monitor behaviour to determine if this is windows or a third party.

    Perform a Clean Boot in Windows 10 to Troubleshoot Software Conflicts
      My ComputerSystem Spec

  5.    26 Mar 2018 #5

    It's not easy to catch it at 3am, there seems to be no fixed time. Yesterday woke at 7am.

    About clean boot. To troubleshoot, - since I don't see programs that refused to install or didn't run properly etc - it looks like I'll have to enable Startup items one by one, every day, to see what is causing it to wake? Ouch.

    PS. Today it didn't wake because I shut it down completely, by holding Power button for a few seconds - for some reason it refused to Hibernate. After this, all the icons on the desktop were re-arranged. Well, the machine is 7 years old...
      My ComputerSystem Spec

  6.    26 Mar 2018 #6

    Perhaps try Nir Sofer's TaskSchedulerView? This will list all scheduled tasks and their trigger times:

    Click image for larger version. 

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    Make sure you download the version appropriate for your system - both x32 and x64 versions are available. Once unzipped, right-click on the executable and use Run as administrator.

    Hope this helps...
      My ComputerSystem Spec

  7.    26 Mar 2018 #7

    Sorry could not resist - dont set the alarm!!
      My ComputerSystem Spec

  8.    27 Mar 2018 #8

    Thanks, RickC. Nirsoft is nice. There was indeed a mysterious "Device" scheduled at 3am, and half a dozen other things.
    Being self-taught, I don't recognize most of them, so just disabled whatever was scheduled to run in the night. I know many people just let machines run 24x7, but I'm old school.

    Ideally, would prefer to modify Triggers for those tasks to "Specific time IF Logon = Yes", so it would only run when machine is On. Probably can do this by locating the app and changing properties. Later. Maybe. If disabled apps give me troubles.
      My ComputerSystem Spec


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