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  1.    04 May 2017 #251
    Join Date : Jun 2015
    Posts : 531
    Windows 10 Pro 64bit; Windows 10 TP; KDE Neon

    Quote Originally Posted by fdegrove View Post
    Hi,



    If you recall exactly what you've changed then, yes, it is possible but it involves some work at your end and what will it solve ?



    Quite probably but I still wonder what's causing this DCOM error. Most of these DCOM errors are pretty much benign and we all have them (and mostly the same ones) on our installs. Solving them is pretty straightforward once you grasp the mechanism involved.

    I still suspect it must be some software package you have or had installed that triggered it. No idea why it does not seem to obey to the basic fixing routines though.

    In this particarly obtuse case I'd opt for a clean install and start with a clean slate again.

    Best of luck,
    Thank you for your continuous support

    I do not care any more. This error does not affect my system in any way. On the next clean installation, most probably around September, I might revisit this issue.

    All the best!
      My ComputerSystem Spec
  2.    04 May 2017 #252
    Join Date : Oct 2015
    Posts : 1,966
    Windows 10 Pro X64

    Hi,

    You're most welcome.
    Come September come other issues no doubt.
      My ComputersSystem Spec
  3.    04 May 2017 #253
    Join Date : Jul 2015
    Posts : 3,652
    10 Pro

    Quote Originally Posted by Joanne View Post
    Can / Should I go back and, somehow, revert those Registry changes to their Default state? Is this even possible? .
    I agree with everything @fdegrove said above.

    You can't reset to default in Windows - only clean install. If you can remember what you changed (or saved the acls beforehand with icacls) you can revert it but otherwise, no.

    I clean install a lot but if you want to play with permissions try something like this to save and restore permissions..
    PHP Code:
    function takeOwn-folder ($folder)
    {   
    $toplevel=Split-Path $folder -leaf

        
    # Delete the old .acl file (in case it exists)
        
    If (Test-Path "$PSScriptRoot\$toplevel.acl") {Remove-Item "$PSScriptRoot\$toplevel.acl" -Force -ErrorAction 0}
         
        
    # backup ACLs for folder
        
    icacls "$folder/save "$PSScriptRoot\$toplevel.acl" /
         
        
    # take ownership - note the /d Y on takeown - it means answer prompt with Y.  See
        # http://serverfault.com/questions/786764/takeown-you-do-not-have-permission-to-read-the-contents-of-directory
        
    takeown /"$folder//d Y
         
        
    # Grant full rights to current user
        
    icacls "$folder--% /grant "%USERDOMAIN%\%USERNAME%":(F) /t
    }
    #-------------------------------------------------------------------------------------------------
    function restoreOwn-folder ($folder$owner)
    {   
    $toplevel=Split-Path $folder -leaf
        $parentPath
    =Split-Path -parent $folder
     
        
    # reset owner to the owner passed in as parameter - e.g. "NT SERVICE\TrustedInstaller"
        
    icacls "$folder/setowner "$owner/t
             
        
    # Restore ACLs
        
    icacls "$parentPath/restore "$PSScriptRoot\$toplevel.acl"
             
        
    # Tidy up
        
    Remove-Item "$PSScriptRoot\$toplevel.acl" -Force -ErrorAction 0
        

    Last edited by lx07; 04 May 2017 at 16:57. Reason: Formatting
      My ComputerSystem Spec
  4.    13 May 2017 #254
    Join Date : Dec 2015
    Athens, Greece
    Posts : 130
    Windows 10 Pro x64

    Thumbnail Cache Class Factory for Out of Proc Server
    {AB8902B4-09CA-4BB6-B78D-A8F59079A8D5}


    I have 870 errors from DCOM {AB8902B4-09CA-4BB6-B78D-A8F59079A8D5} the last 4 months.

    Event ID: 10000
    Code:
    Unable to start a DCOM Server: {AB8902B4-09CA-4BB6-B78D-A8F59079A8D5}. The error:
    "367"
    Happened while starting this command:
    C:\WINDOWS\system32\DllHost.exe /Processid:{AB8902B4-09CA-4BB6-B78D-A8F59079A8D5}
    It used to also give some 10010 errors in the past, "The server {AB8902B4-09CA-4BB6-B78D-A8F59079A8D5} did not register with DCOM within the required timeout.", but 2.5 months ago it stopped, without me knowingly doing something (maybe an MS update took care of them!), but the 10000 errors keep coming very frequently.

    Does anyone have any idea what this DCOM component "Thumbnail Cache Class Factory for Out of Proc Server" is and what does it do?
    And of course, is there a way to fix the EventID 10000 it produces?

    If it's worth something I'm on W10x64 Pro Version 1607 Build 14393.1198
      My ComputerSystem Spec
  5.    13 May 2017 #255
    Join Date : Oct 2015
    Posts : 1,966
    Windows 10 Pro X64

    Hi,

    Check your system for malware and remove the offender. Then run sfc /scannow after you have rebooted.
    Powelik Trojan :

    https://www.bleepingcomputer.com/vir...oweliks-trojan

    Cheers,
      My ComputersSystem Spec
  6.    13 May 2017 #256
    Join Date : Dec 2015
    Athens, Greece
    Posts : 130
    Windows 10 Pro x64

    Quote Originally Posted by fdegrove View Post
    Hi,

    Check your system for malware and remove the offender. Then run sfc /scannow after you have rebooted.
    Powelik Trojan :

    https://www.bleepingcomputer.com/vir...oweliks-trojan

    Cheers,
    Thanks, I'll give it a try!...and post back
      My ComputerSystem Spec
  7.    13 May 2017 #257
    Join Date : Dec 2015
    Athens, Greece
    Posts : 130
    Windows 10 Pro x64

    I run the eset cleaner.

    In its log I found that it did scan in:

    [2017.05.14 00:12:38.850] - INFO: Processing [HKLM\SOFTWARE\Classes\CLSID\{AB8902B4-09CA-4bb6-B78D-A8F59079A8D5}]...
    [2017.05.14 00:12:38.850] - INFO: Processing subkey [\Registry\Machine\SOFTWARE\Classes\CLSID\{AB8902B4-09CA-4bb6-B78D-A8F59079A8D5}\InprocServer32]


    ...but it didn't find anything!!!

    Click image for larger version. 

Name:	eset.png 
Views:	3 
Size:	24.8 KB 
ID:	134847

    Any other idea... @fdegrove ?
      My ComputerSystem Spec
  8.    13 May 2017 #258
    Join Date : Oct 2015
    Posts : 1,966
    Windows 10 Pro X64

    Hi,

    Is this just a time out error you see in "Event Viewer" or is there something else not working ?

    There's not much you can do regarding time outs which most often occur on slower drives (HDDs) when booting or when the system is woken up from sleep/hibernation. Everything usually works fine once the system has settled down.
    I am glad already no virus seems to be involved....

    Cheers,
      My ComputersSystem Spec
  9.    13 May 2017 #259
    Join Date : Dec 2015
    Athens, Greece
    Posts : 130
    Windows 10 Pro x64

    No, everything seems to be working perfectly.
    Up to a couple of months ago, maybe a little more, there was also a timeout error (EventID 10010):
    EventID: 10010 , "The server {AB8902B4-09CA-4BB6-B78D-A8F59079A8D5} did not register with DCOM within the required timeout.".
    Not any more. I haven't seen the timeout error for more than 2.5 months.... and as you said, I had seen it and didn't bother, as I couldn't do anything with the timeout.

    But the other one EventID 10000 is still there...The last time shown in event viewer is 2 days ago.

    Currently, I just checked procexp and it runs.
    C:\WINDOWS\system32\DllHost.exe /Processid:{AB8902B4-09CA-4BB6-B78D-A8F59079A8D5} and didn't produce any error.
      My ComputerSystem Spec
  10.    13 May 2017 #260
    Join Date : Oct 2015
    Posts : 1,966
    Windows 10 Pro X64

    Hi,

    Ok, should the error crop up again I suggest you post a screenshot of the EV error with all the details.

    Best,
      My ComputersSystem Spec

 
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