Windows 10: Windows 10 PC waking from sleep at same time each day Solved


  1. Posts : 2
    Windows 10 Home
       29 Oct 2015 #1

    Windows 10 PC waking from sleep at same time each day


    Recently I have been finding my PC powered up when it should be sleeping. Using powercfg -lastwake does not show a cause but looking at system events I can that there are a series of events each day starting at 08:59:31. One of these is a Power - Troubleshooter event which says that the system has returned from a low power state but Wake Source is unknown. This and the other messages are ones that normally appear if I wake up the PC manually. There are subsequent events from Windows Update so I thought that might be the cause but it does not run immediately and I now believe that it is running because the PC has woken up and is not causing it to wake.

    I have checked in Power Options Advanced Settings/Sleep and Allow wake timers is set to disabled.

    I have checked that on my network adaptor, 'Allow this device to wake the computer' is not checked.

    I have checked Control Panel/Security and Maintenance/Automatic Maintenance and Allow scheduled maintenance to wake my computer at the scheduled time is unchecked.

    I had also checked in Task Scheduler and under WindowsUpdate there are 4 tasks but under Conditions, none are set to 'Wake the computer to run this task'.

    Checking back through the event logs it seems that this problem first happened on 27th Sep and always happens at 08:59:31. I have looked at the event log for the previous day and can see some events relating to the installation or update of a device driver although I haven't made changes to the hardware for a long time. It is followed by an event relating to Disk 3 which I don't normally have so I assume these were as a result of plugging in a USB device. There are also events relating to a windows update of VCLibs 12.

    Any suggestions how I can track down the culprit?
      My ComputerSystem Spec

  2.    30 Oct 2015 #2

    Hi, is it possible you have a scheduled task elsewhere than where you have looked set to wake the PC?

    Since you know the time, you could run Sysinternals Process Monitor to record what's happening- albeit analysing the extensive log can be tedious.
      My ComputerSystem Spec


  3. Posts : 2,303
    Windows 10 Pro 64-bit 1706 (CU build 15063.608)
       30 Oct 2015 #3

    Some computers can be set by the BIOS to switch on at specific time. Check the BIOS.
      My ComputerSystem Spec


  4. Posts : 2
    Windows 10 Home
    Thread Starter
       03 Nov 2015 #4

    dalchina said: View Post
    Hi, is it possible you have a scheduled task elsewhere than where you have looked set to wake the PC?

    Since you know the time, you could run Sysinternals Process Monitor to record what's happening- albeit analysing the extensive log can be tedious.
    Thanks for the suggestion. What I found was there was nothing significant at 08:59:31 when the PC first woke up but at precisely 09:00 there was a registry read for a scheduled task, the excellent SyncBack Free. I normally have its tasks running in the evening and set not to wake up the computer but somehow I assume they were set to what must have been default values of 09:00 and wake up the computer. Not sure how it happened but it is resolved now.
    Thanks for the help.
      My ComputerSystem Spec


 

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