This time, I have discovered a solution for when you cannot install the cumulative update KB5050009 for Windows 11 version 24H2, so I would like to introduce it to you.
As I mentioned in my previous article, in my environment, KB5050009, which should have already been installed, was repeatedly installing and failing.
KB5050009 installation error 0x800f081f
Then, when I try to install KB5050094 (2025/01/28), which was released after KB5050009, the same error or 0x800f0838 occurs, and the installation does not succeed no matter how many times I try.
*Downloading KB5050094 (msu file) from the Microsoft Update Catalog and attempting to install it was unsuccessful.
KB5050094 fixes an issue that could cause cumulative updates to not be installed, so I thought that if I could just successfully install KB5050094, the problem would be solved, so I tried various things.
*The method introduced here has only been confirmed in the author's environment, so it may not be possible to resolve the issue in all environments.
What helped me to solve the problem
The solution to this issue was found on the official Microsoft page: 0x800f0831 This is a document about.
Since I couldn't find any information about error number 0x800f0838, I decided that the cause was roughly the same as the nearby number 0x800f0831.
According to Microsoft, error 0x800f0831 occurs for the following reasons:
- This issue occurs because the update that cannot be installed requires a manifest from a previous update package.
Updates that cannot be installed, i.e."KB5050094" requires the package manifest of the previous update "KB5050009"I interpreted it as a reason.
Microsoft says that this can be resolved by repairing the Windows image and repairing system files, but this did not work in my environment.
How to fix the issue of not being able to install KB5050009
The author's situation at the time
- KB5050009, which should have already been installed, repeatedly failed to install (error 0x800f081f).
- I was performing a Windows Update cleanup, so I can't uninstall KB5050009.
- When I try to install KB5050094, I get the error 0x800f081f or 0x800f0838 and the installation fails.
Steps taken to resolve
By following these steps, KB5050094 was successfully installed and the issue was resolved.
1. Uninstall the 2025-01 Cumulative Update KB5050577 for .NET Framework 3.5 that you had installed and restart your PC.
2.Windows Update screenOpen it and click "Check for updates" (retry all files).
This will start the download of KB5050009.
3. Once the download of KB5050009 starts, immediately click "Advanced options" at the bottom.
4. Click "Optional Updates" under Additional Options.
5. Check "KB5050094" and "KB5050577" and click "Download and Install."
- 2025-01 Cumulative Update for Windows 11 Version 24H2 for x64-based Systems (KB5050094)
- .NET Framework 3.5 用の2025-01累積的な更新プログラムのプレビューと x64 (KB5050577) のWindows 11, version 24H2 用の4.8.1
6. The update was successful and I was asked to restart, so I did so immediately.
7. After restarting your PC, open the Windows Update screen again and click "Check for updates."
8. The download and installation of KB5050094, which was previously successfully installed, will begin.
9.KB5050094 was installed successfully and I was asked to restart, so I did so immediately.
*When starting up your PC, you may see a black screen and nothing will be displayed for a while. Then the updating screen will appear and the PC will restart automatically again.
10. After restarting your PC, open the Windows Update screen again and click "Check for updates."
However, the download of KB5050094 did not start and the message "You are up to date" was displayed.
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