Hi, @Vijayalakshmi K
Thank you for posting in Microsoft Q&A forum.
As a common Windows update error, the error “we couldn’t complete the updates undoing changes Windows 10” occurs due to the following possible causes:
- Lack of enough free disk space.
- The update is interrupted during the installation process.
- Corrupted system files.
Here are some solutions for this error in below article, you may check it to see if it helps:
https://www.partitionwizard.com/resizepartition/we-couldnt-complete-the-updates-undoing-changes.html
(Please note: Information posted in the given link is hosted by a third party. Microsoft does not guarantee the accuracy and effectiveness of information.)
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