Forum Discussion
2025-10 Cumulative Update for Windows Server 2019 (KB5066586) Undoes Update on Reboot
So even though I ran DISM /Online /Cleanup-Image /ScanHealth, and no errors were found, you still recommend running DISM.exe /Online /Cleanup-Image /RestoreHealth ? I am glad to give it a try.
I don't have a similar image to copy from unfortunately.
I checked the CBS log file, but it does not go back far enough to get information on the install failure. I'll save this log file after my next attempt. I am also going to update the drivers on this server.
I will rerun DISM with the RestoreHealth option this Saturday and report back.
This has been a tough one to diagnose. I greatly appreciate you help with this.
Hello Michael2000.
Your action plan covers most of the possible causes so if still the same, I do not think there's much you can do (maybe, some package that became corrupt leading to the actual scenario).
Only thing left is to double-check if following scenario applies: https://learn.microsoft.com/en-us/troubleshoot/windows-client/performance/windows-devices-fail-boot-after-installing-kb4041676-kb4041691
Thank you for your response. Unfortunately, the article does not apply to what I am experiencing. The system is not having trouble rebooting. It reverses the installation of the Cumulative Update on reboot.