Windows 10: Synchronize Clock with an Internet Time Server in Windows 10  

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  1. Posts : 567
    Windows 10 Pro 64bit; Windows 10 TP; KDE Neon
       01 Feb 2016 #10

    So, Brink, according to my screenshot above even though I've set it to sync every 24 hours it ignores me?
    And if it does, which sucks, is this the only solution?
      My ComputerSystem Spec

  2. Posts : 28,489
    64-bit Windows 10 Pro build 17643
    Thread Starter
       01 Feb 2016 #11

    It would be worth a try, but a few seconds is not going to hurt anything since it should eventually auto sync before the time gets to out of sync.
      My ComputersSystem Spec

  3. Posts : 567
    Windows 10 Pro 64bit; Windows 10 TP; KDE Neon
       02 Feb 2016 #12

    Well, I made it work and I'm really glad for this!

    (I suppose it is obvious that I am NOT doing all this for the 2-3 seconds my clock was out of sync - IF it actually was - but for the possibility to set MY OWN sync time interval).

    The solution was simple: I changed the Status of the Windows Time Service, W32Time, from Manual to Automatic. Then I set the SpecialPollInterval value to 360 seconds (6 minutes) just for testing purposes. It works perfectly!

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    Between these 6 minutes I have changed my System Time, both the hour, the minutes and the seconds to various values, without rebooting. Like 2 hours + X min + Y seconds ahead. After 6 minutes it synchronized to the correct time

    Before doing this simple task - changing the Status of the Service - I played a bit with the default SynchronizeTime task in the Task Scheduler, and also tried to create my own Time_Sync task. Nothing worked. The only thing that worked - after restoring the default SynchronizeTime at its default state, was the setting of W32Time to Automatic (so now it runs all the time - I think).

    Anyway, I'm really glad about this. I will now change the SpecialPollInterval to 86400 seconds = 24 hours, and keep an eye on this.

    Thank you!

    EDIT: One thing I've observed, after all this, is that now my clock synchronizes each time I reboot. I don't know if this has something to do with the fact that I've "played" a bit with the default SynchronizeTime task in the Task Scheduler, I do not mind at all however. It does keep the interval set in the Registry, though, six hours in this example:

    Click image for larger version. 

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    So, now it is like this: if I reboot the clock syncs right way. If I won't, it will sync 6 hours after the initial synchronization.

    Last edited by Joanne; 02 Feb 2016 at 05:14.
      My ComputerSystem Spec

  4. Posts : 28,489
    64-bit Windows 10 Pro build 17643
    Thread Starter
       02 Feb 2016 #13

    Great news Joanne.
      My ComputersSystem Spec

  5.    05 Mar 2016 #14

    With me the Windows time is about 2-3 minutes off.

    I did try to resync
    Control Panel\Clock, Language and Region->Tab Internet Time change settings
    using both and
    no change

    then w32tm /resync
    then set services.msc windows time->automatic

    still no change.

    didn't go thru the steps of Joanne: would not know where to find this 'SpecialPollInterval'-thing.

    discovered this 'wrong windows time' as I normally set all clocks and my wristwatch to Windows.
    Updated all times when changing from Feb. 29 to march 01 and started missing the news on the radio and tv.

    Will not be using Windows time anymore.

    Click image for larger version. 

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      My ComputerSystem Spec

  6. Posts : 28,489
    64-bit Windows 10 Pro build 17643
    Thread Starter
       05 Mar 2016 #15

    Hello tfwul,

    Are you getting a successful sync using OPTION ONE?

    You last screenshot from using OPTION TWO show that is was not able to sync with the time server.

    If you're not getting successful syncs in a row, then you may need to keep trying different time servers until you find a more reliable one.

    Here's the tutorial below for SpecialPollInterval that's for how to increase the update interval for Internet time synchronization to have it check and sync more often.

    Internet Time Synchronization Update Interval
      My ComputersSystem Spec

  7.    06 Mar 2016 #16

    Hello Brink,

    I tried option 1: that is the option with the timeservers, right?

    got some error
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    Have updated the registry setting (SpecialPollInterval) to 86400

    Click image for larger version. 

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    I need to wait until tomorrow before I know it will work.

    Meanwhile my Internet Security Suite seems to be malfunctioning, the license key cannot be applied.
    The support pages provide a few causes and one of them is

    Incorrect system date & time: Please check the date & time on your computer. If this information is incorrect, please correct it and then try inserting the license again.

    Wonder whether this 2,5 minutes 'wrong' could be the cause.


    p.s. later . . .

    somewhere I read about disabling the firewall, which I did on a temporary basis
    the time is okay now.
    will need to check if indeed it is a firewall thing.
    Last edited by tfwul; 06 Mar 2016 at 10:09.
      My ComputerSystem Spec

  8. Posts : 28,489
    64-bit Windows 10 Pro build 17643
    Thread Starter
       06 Mar 2016 #17


    Double check to make sure that the firewall is not set to block the NPT access on UDP port 123, and allow Internet Time Server.
      My ComputersSystem Spec

  •    07 Mar 2016 #18

    Ah! Many thanks. Port 123 seems to be have been blocked.
    What do you think of port 13? Somewhere I read about 'daytime protocol'?

    Click image for larger version. 

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      My ComputerSystem Spec

  • Posts : 28,489
    64-bit Windows 10 Pro build 17643
    Thread Starter
       07 Mar 2016 #19

    That's correct. Port 13 is for "Daytime Protocol".
      My ComputersSystem Spec

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