Windows 10: Event ID 10016, DistributedCOM

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  1. Posts : 9
    Windows 10 Pro x64
       03 Jun 2018 #31

    This is getting very weird. Without modifying anything whatsoever, suddenly the event is not triggered anymore for one of the Users (the PC has two users) - no event for the last two days.
      My ComputerSystem Spec

  2.    04 Jun 2018 #32

    alpha45 said: View Post
    Moreover, today after the last modification, the following error occurs:
    DistributedCOM id 10001
    Can not start a DCOM server Microsoft.Windows.ContentDeliveryManager_10.0.17134.1_neutral_neutral_cw5n1h2txyewy! App.AppXryc2qd338f5728r9gzzazav8206ba77s.mca as Not Available / Not Available. The error
    "%% 0"
    occurred during command execution
    "C: \ WINDOWS \ system32 \ backgroundTaskHost.exe" -ServerName: App.AppXmtcan0h2tfbfy7k9kn8hbxb6dmzz1zh0.mca..
    hi
    I don't think this is related to the permission you gave to your account.
      My ComputerSystem Spec


  3. Posts : 21
    Windows 10 Pro x64 1803
       24 Jun 2018 #33

    Hi, I tried this to remove the same error, and it appeared to work fine and the error went away for several boots, but now it's come back again, exactly as before! The procedure seems to have correctly added me as a user with local activation permission (only) to Windows Management and Instrumentation in DCOM Config. I assume that's what it should have done, but the error messages are still there.
      My ComputerSystem Spec


  4. Posts : 21
    Windows 10 Pro x64 1803
       04 Jul 2018 #34

    The errors are still happening, but only at boot time, often two with the same time stamp.
    I can actually change the security permissions on Windows Management and Instrumentation in DCOM Config without DCOMPerm, using the normal interface, is that normal?
    Giving local activation permission to myself with DCOMPerm or manually using the UI seems to make no difference to the problem anyway!
      My ComputerSystem Spec


  5. Posts : 9
    Windows 10 Pro x64
       09 Jul 2018 #35

    In my case, the problem started suddenly in the middle of May. No new Apps installed, no OS or other settings change, no OS update (Windows 10 Pro - 1709), no nothing. As per post #8, the event repeats every 4 hours. I’ve tried all of the different available methods in order to get rid of this event without any success. There is a scheduled task repeating every 4 hours - Task Scheduler Library/Microsoft/Windows/Windows Update/Automatic App Update (automatically updates the user's Windows store applications); I’ve ‘played’ with this task but it didn’t solve the problem either. Upgrading the OS to version 1803 doesn’t solve the problem because it seems to be also ‘inherited’.
      My ComputerSystem Spec


  6. Posts : 21
    Windows 10 Pro x64 1803
       09 Jul 2018 #36

    A few days ago, I tried as an experiment giving ALL APPLICATION PACKAGES Local Activation permission (only) on Windows Management and Instrumentation in DCOM Config.
    I haven't seen the error message since.
    Whether this is opening up a security hole I don't know, but it only gives permission to activate, not to launch.
    It does seem to be a fix for the error message, but what are people's thoughts on the desirability of this?
      My ComputerSystem Spec

  7. f14tomcat's Avatar
    Posts : 36,213
    Triple boot - Win 10 Pro, Win 10 Pro Insider (2) - (and a sprinkling of VMs)
       09 Jul 2018 #37

    DaveH1 said: View Post
    A few days ago, I tried as an experiment giving ALL APPLICATION PACKAGES Local Activation permission (only) on Windows Management and Instrumentation in DCOM Config.
    I haven't seen the error message since.
    Whether this is opening up a security hole I don't know, but it only gives permission to activate, not to launch.
    It does seem to be a fix for the error message, but what are people's thoughts on the desirability of this?
    Little fuzzy, but bottom line....seems if the Launch had already occurred from some other process, Access gives it permission to use the already Launched, but not to launch itself. In other words...if the door is already open, the bad guy can walk in, but he can't open the door himself automatically.



    AccessPermission Describes the Access Control List (ACL) of the principals that can access instances of this class. This ACL is used only by applications that do not call CoInitializeSecurity.
    LaunchPermission Describes the Access Control List (ACL) of the principals that can start new servers for this class.


    about a page down......
    permissions - What do the different DCOM / COM security settings mean? - Stack Overflow
      My ComputersSystem Spec


  8. Posts : 21
    Windows 10 Pro x64 1803
       09 Jul 2018 #38

    Thanks, that's very useful, and a very good analogy!
    So I guess Microsoft.Windows.ContentDeliveryManager is trying to activate and can't, whether it's already launched or not, which is what's throwing the error. This may be expected behaviour in some circumstances, as detailed here, but it's still annoying. Regular error messages in an operating system which happen all the time and are supposed to just be ignored, simply make people blasé about the contents of the error logs, and they may well miss errors which really matter!
      My ComputerSystem Spec


  9. Posts : 9
    Windows 10 Pro x64
       10 Jul 2018 #39

    Nice fix. Finally I'm getting a clean event log again.
      My ComputerSystem Spec


  10. Posts : 21
    Windows 10 Pro x64 1803
       10 Jul 2018 #40

    Good to hear, but do bear in mind that this is just a workaround, not a fix, and could potentially leave your system vulnerable to security breaches, as has been said.
      My ComputerSystem Spec


 
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