Windows 8 and 8.1 Forums


Computer Wakes at 3:14 AM to Sync Hardware Clock

  1. #11


    Posts : 454
    Windows 8.1 Pro with Media Center


    If you are a Media Center user, the mcupdate_scheduled task is notorious for waking the computer in the middle of the night. The solution is to uncheck "Wake the computer to run this task" in Task Manager. You can check it out in Task Manager under Microsoft/Windows/Media Center.

      My System SpecsSystem Spec

  2. #12


    Omak, WA
    Posts : 34
    Windows 8.1 64 bit


    Ok. I looked at my Auto Maintenance thing and it was set to 2:00 p.m. Fast Boot is turned off and in the motherboard BIOS all three Power on items were disabled including Power on by RTC.--but the computer still has something waking it up at times around 3 or 4 a.m. (I turn off the Internet service at night so it can not wake the computer.) This would seem to be a Microsoft related problem, so they should make it easy to change the time the computer wakes up.

    Thanks.
      My System SpecsSystem Spec

  3. #13


    Posts : 2,191
    Windows 8.1


    Quote Originally Posted by WCarp View Post
    Ok. I looked at my Auto Maintenance thing and it was set to 2:00 p.m. Fast Boot is turned off and in the motherboard BIOS all three Power on items were disabled including Power on by RTC.--but the computer still has something waking it up at times around 3 or 4 a.m. (I turn off the Internet service at night so it can not wake the computer.) This would seem to be a Microsoft related problem, so they should make it easy to change the time the computer wakes up.

    Thanks.
    OK, thanks for checking. BTW, are you using a hardware router in the mix or are you using a direct connect to the ISP modem? The reason I'm asking is because it appears that the stimulus is coming from an external source if you disabled your internet and all is OK. However, If you use a router, then I am a bit perplexed as to how that "wake on" is getting through that router unless some specific port has been opened to accommodate the request. It might be interesting to test and see if you have any vulnerable ports. Go here if you would like to run a test:

    https://www.grc.com/x/ne.dll?bh0bkyd2

    Here are my results for comparison:

    Click image for larger version

    Note that all inbound queries/probes are blocked and nothing can get into my PC without invitation.
    Last edited by my2cents; 08 Oct 2013 at 04:36.
      My System SpecsSystem Spec

  4. #14


    Omak, WA
    Posts : 34
    Windows 8.1 64 bit


    My Internet connection is disabled at night so it is not causing the problem. I have had a 2nd level Microsoft Support person try to figure out what is causing this problem and so far he hasn't found the problem after trying the two times he has called.

    Thanks.
      My System SpecsSystem Spec

  5. #15


    Posts : 2,191
    Windows 8.1


    First you state:
    I turn off the Internet service at night so it can not wake the computer.
    So the computer does not wake when the internet is turned off.


    Then you say:
    My Internet connection is disabled at night so it is not causing the problem.
    So your internet is turned off and you still have the problem.


    In any event, it sounds like good old MS will get you through this just fine. Good luck.
      My System SpecsSystem Spec

  6. #16


    Omak, WA
    Posts : 34
    Windows 8.1 64 bit


    I have had many bad experiences with MS Support so I'm not sure how this will work out.

    Thanks.
      My System SpecsSystem Spec

  7. #17


    Posts : 2,191
    Windows 8.1


    This new 8.1 option might be able to mask your issue if you decide to upgrade and it can't be found by MS:

    Quiet Hours - Enable or Disable in Windows 8.1

    Good luck.
      My System SpecsSystem Spec

  8. #18


    Why you just don't "kill" Windows Time service ?
      My System SpecsSystem Spec

  9. #19


    WCarp,

    ms t/s and c/s run hot and cold, 50-50. some are good; some are not.
    there are so many things inter-related in any OS incl. W8, it is often hard to say unless one has already encountered the issue.
    your current issue seems unique in that regard.

    like it or not, one has to be systematic (to a degree) in one's own process to find the cause of a problem.
    whenever I get stuck, I try to: 1) accept it may take some time; 2) find a way to live with it until I prevail, and; 3) don't let it drive me crazy.

    an IT tech at work once told me; "just walk away from it (the PC in my case); it will come to you."
      My System SpecsSystem Spec

  10. #20


    Posts : 6
    win 10


    \Microsoft\Windows\SettingSync\NetworkStateChangeTask found one more task that power on PC from sleep at win10
      My System SpecsSystem Spec

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