FIXED: We couldn’t Complete The Updates Undoing Changes

Do you use this error when trying to start an update? We couldn’t complete the updates, undoing changes. (Error: 1726)

This is likely because another user has made changes on the computer since the last time you ran Windows Update. This can be caused by playing with settings, doing installs/uninstalls, or just plain downloading random stuff.

Causes Of ‘We Couldn’t Complete The Updates Undoing Changes’ Error on Windows?

Following are some of the causes of this issue:

  • Corrupted Download: This problem can be caused if the download of Windows Updates was corrupted. In this case, either re-download the update or try installing a fresh copy from the website.
  • Corrupted Installation File: If you have tried to install a fresh copy of Windows Updates and it still doesn’t work out, then there is a possibility that your installation file was corrupted. In this case, you have to re-download the installation files all over again.
  • Corrupted Windows Backup: If your computer is not regularly backing up system files and data, it can lead to an issue where Windows Updates are unable to restore Microsoft Windows back to its original state after applying updates.
  • Outdated or Corrupted Antivirus: Outdated or Corrupted Antivirus is also a reason why Windows Updates are not able to undo changes. In this case, you should try uninstalling the antivirus and then re-run updates.
  • Multiple Users On A System: If multiple users have been logged onto the system after performing Windows Update and before you try to run Windows Update again, then it can lead to this problem.

Solutions To Fix ‘We couldn’t Complete The Updates Undoing Changes’

Following are some of the solutions that can be applied to fix this problem:

Solution 1: Turn On the App Readiness Service

If you have a custom program that has been installed after the update was applied, then this might be a cause of this error. In order to fix it, turn on the App readiness service and try running updates again. To do so:

  1. Right-click on your Windows icon and select Command Prompt (Admin).
  2. Type the following command and press Enter:
net start appreadiness
  1. Now try running the updates again.

Solution 2: Reverting Changes Made By Windows Update

If after applying Windows Updates you have made changes to your computer, such as enabling or disabling startup items, file associations, etc., then it can cause this issue. In order to fix it, revert the changes back by following these steps:

  1. Open Service Manager by typing ‘services’ in the search box and pressing Enter.
  2. Look for the service named Windows Update and right-click on it. Select Properties from the menu.
  3. Go to the General tab and click on Restart under the Service status area and wait for a couple of seconds before closing the Services window.
  4. Now run updates again to see if it works or not.

Solution 3: Fixing Corrupted System Files

If you have tried re-downloading Windows Updates and still your problem continues, then it can be solved by reinstalling system files. To do so follow these steps:

  1. Close all running programs and go to Command Prompt (Admin) in start menu search box and right-click on it to open as Administrator.
  2. Enter the following command line one by one and press Enter after each of them:
sfc /scannow chkdsk /r
  1. After entering both commands, restart your computer to apply changes. This process will take some time, so you can open Windows Updates again to see if this problem still exists or not.

Solution 4: Fixing WU Client UI

If your computer is having issues with updating, then it might be a problem with the WU client user interface. To fix it, enter This PC in File Explorer and look for either an exclamation point or a blue screen. If you can see either one of them, then delete the folder to fix the problem.

You can also try following these steps:

  1. Go to Command Prompt (Admin) in start menu search box and right-click on it to open as Administrator.
  2. Type the following command line one by one and press Enter after each of them:
net stop wuauserv net stop cryptSvc net stop bits net stop msiserver ren C:\Windows\SoftwareDistribution SoftwareDistribution.old ren C:\Windows\System32\catroot2 catroot2.old shutdown -r -f -t 5
  1. Restart your computer and check if you are able to run updates or not.

We hope that this article helped you in fixing the We couldn’t complete the updates undoing changes problem. If you have any queries regarding this topic, please feel free to ask them in the comment section below.

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