Windows 10: Windows update "Couldn't complete this update, undoing changes."

Discus and support Windows update "Couldn't complete this update, undoing changes." in Windows 10 Installation and Upgrade to solve the problem; Im sick and tired of it, Cumulative Update for Windows 10 Version 20H2 for x64-based Systems KB5007186 keeps failing and undoing changes, how can I fix... Discussion in 'Windows 10 Installation and Upgrade' started by Novoroh, Nov 24, 2021 at 7:07 PM.

  1. Novoroh Win User

    Windows update "Couldn't complete this update, undoing changes."


    Im sick and tired of it, Cumulative Update for Windows 10 Version 20H2 for x64-based Systems KB5007186 keeps failing and undoing changes, how can I fix this?Thank you.

    :)
     
  2. Arun B J Win User

    We couldn't complete the updated, undoing changes...

    Hi,



    I suggest you to run the Windows Update troubleshooter and check if it helps.

    Windows 10 has a built-in troubleshooter to check and fix issues with Update. I would suggest you to run this troubleshooter to check if the issue is with your Windows update.

    Refer these steps:


    • Press Windows key +X, select
      Control panel.

    • Change the view by option on the
      top right to Large icons.

    • Click on troubleshooting and click on the
      view all option on the left panel.

    • Run the Windows Update troubleshooter.


    Keep us posted on this issue so that we can assist you better.
     
  3. marius-O Win User
    Windows 10: "We couldn't complete the updates, undoing changes"

    I've got the same issue and following on @Arthur's suggestion, I had a look at my user SIDs in the registry under HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\Windows NT\CurrentVersion\ProfileList and some of them belonged to users that no longer existed in the system (I had previously removed them).

    I've removed the dummy entries (luckily there were only a couple) and the update worked.

    PLEASE save yourself some trouble and backup the registry before trying that.
     
  4. Windows update "Couldn't complete this update, undoing changes."

    Windows can't complete the update and then it undoes all the changes

    I am trying to update my windows to 1809, to use the ray tracing features on my RTX 2070. I am currently on version 1803. When I try to update using the windows 10 update assistant, it goes through all the steps but once it restarts to update I start to
    have problems. It gets to 16% complete and then starts undoing changes. How can I fix this?
     
Thema:

Windows update "Couldn't complete this update, undoing changes."

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