Hello The error message cannot complete update undo changes indicates the update rollback failure during reboot, try below methods to help fix:
- 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.
- Restart the system and check if the issue is resolved. 6.Also try uninstall the 3rd party antivirus software. 7.If above methods still fails, try force reboot machine when update cannot finish, and then boot machine into safe mode, try install update in safe mode: Start your PC in safe mode in Windows - Microsoft Support Best Regards, Wesley Li ============================================ If the Answer is helpful, please click "Accept Answer" and upvote it.