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Hey,
I am currently running a Windows 11 24H2 Insider Preview build, and I am trying to move back to the normal/stable Windows 11 24H2 release without performing a clean installation.
I have already attempted an in-place upgrade using a Windows 11 24H2 ISO created using UUP Dump, but the upgrade failed with 0xC1900101.
The detailed error is:
0xC1900101-0x20017 — The installation failed during the SAFE_OS phase with an error during the BOOT operation.DISM /RestoreHealth → fails with 0x800F0915SFC /scannow → finds corrupt files but cannot repair some of them0xC1900101-0x20017 (SAFE_OS/BOOT)Every time I open Task Manager, I am prompted by User Account Control (UAC) to allow it to run, even though I am using my normal Windows account.
Device Manager and some other administrative tools sometimes refuse to open and display a message saying that Windows is restricting/blocking access to the application.
The affected applications include MMC.exe (Microsoft Management Console) or tools that use MMC.
As a workaround, I have been able to open some of these programs by launching them through Task Manager with administrative privileges.
These issues make me wonder whether there is an underlying problem with Windows system files, permissions, UAC, MMC, or the component store that could also be contributing to the upgrade failure.
My goal is to move from my current Windows 11 24H2 Insider Preview build to the normal/stable Windows 11 24H2 production build, while keeping my files, applications, and settings.
Could the DISM/SFC corruption or the issues with UAC/MMC be related to the 0xC1900101-0x20017 SAFE_OS/BOOT upgrade failure?
What would be the recommended way to diagnose and repair these issues and successfully move to the stable Windows 11 24H2 release without performing a clean installation?
Thanks!
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In-place upgrade from Insider build to normal build sometimes cannot perform if the normal build has lower number than the Insider one.
Regarding the error code 0xC1900101, your system might have corrupt file.
Please try fixing issues by reinstalling the current version of Windows following this article: Fix issues by reinstalling the current version of Windows.
Then try the In-place upgrade again.
If you have further information, please feel free to let me know.
I hope everything is going well on your end. Just wanted to check in and see how things are going for you lately, anything you'd like to share or discuss?
Hi @Lucus-V ,
Thanks for your response. I've tried that too. The updates doesn't install. For now I only got Windows 11 version 24H2 update which doesn't work too.
The latest Windows 11 build is 25H2. It is recommended that you follow the official In-place upgrade steps to upgrade to 25H2.
Disclaimer: Let’s try performing an in-place install or in-place upgrade which will refresh your Windows files and operating system without removing files or applications. That being said, we always recommend that if you have important data, you should back it up before making large system changes. If you want to back up your data first, please do so. Once you are done backing up, you can follow the steps in the following guides: How to run In-place upgrade in Windows 11 - Microsoft Community
Please let me know if you can successfully perform the In-place upgrade.
Alright I'll let you know what the result is.
Hi Ramkumar,
Which exact Insider build are you
currently on? Use WIN+R, type winver
for the build #.
The latest 24H2 is currently 26100.9267.
As a Release Preview build that is considered
a stable build.
Hi @CrazyKats ,
I've left the Windows Insider Program. Just trying to transfer to the stable build of Windows 24H2. The build version is 26100.8772
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Try Leaving insider Program following steps at https://www.microsoft.com/en-us/windowsinsider/leave-program?msockid=2e41e3e006f36a4900f4f54807546b61
Hi Ramkumar,
24H2 is going to reach EOL on
10/13/26, so I would update to 25H2
by using the Media Creation Tool and
doing an in place update.
https://www.microsoft.com/en-us/software-download/windows11
Download and mount the ISO, then open the
folder and run Setup from there.
Hi,
Thanks for everyone's response and helping me throughout this. I tried a new approach of using a bootable media USB and it worked. Had to reset my files but files but D: drive stayed.
Anyways, Appreciate the help from you guys! Hope you guys have a great day!
I'm happy to hear that the problem has been resolved and really appreciate your feedback.
If you have further questions, please feel free to start a new thread.
Hi Ramkumar,
Glad you got the update you wanted
finally.