Windows update can't install some KB

Paolo PB Bianco 20 Reputation points
2025-12-18T10:23:35.0666667+00:00

Hello.

I have a problem with some VM server with Windows 2016 standard, Windows Update it is not able to install some KB, the installation required a lot of time, after that the process failed and rolling back.

In the event viewer there's the follow entry.

Installation Error. The following update could not be installed., errore 0x800F0922: 2025-12 Cumulative Update for Windows Server 2016 for x64-based Systems (KB5071543).

I tried to fix with Windows Update Troubleshooting, indicate a problem with windows update database but it's not able to fix.

I tried with all procedure find online, DISM and software distribution file, also with clean boot.

When I open administrative event in the event viewer appear this message.

User's image

I am not sure it's connected but this problem appear after installation failed.

I don't have the possibility to reinstall windows because there's some application manage from an external team, and there some cost to reinstall that.

the same issue it's it with 10 server working in an RDS system.

Could you help me.

Windows for business | Windows Server | Devices and deployment | Install Windows updates, features, or roles
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Answer accepted by question author
Jason Nguyen Tran 25,370 Reputation points Independent Advisor
2025-12-18T11:13:10.57+00:00

Hi Paolo PB Bianco,

The error code 0x800F0922 typically indicates insufficient system reserved partition space or a failure to connect to the update source, which can be more common in virtualized or RDS environments. Since you've already tried DISM, clean boot, and reset the SoftwareDistribution folder, the next recommended step is to manually download the KB from the Microsoft Update Catalog and install it offline using elevated command prompt. Additionally, you can verify that the .NET Framework and servicing stack updates are current, as missing prerequisites can cause rollback behavior.

If the issue persists across multiple servers, it may be worth checking whether any Group Policy or firewall rules are interfering with update installation or rollback triggers.

You can try and let me know the update. If it’s helpful, please hit “Accept Answer” so I know your concern is being resolved. Thank you!

Jason.

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  1. Daniel Jansen 0 Reputation points
    2026-01-07T15:19:18.74+00:00

    Also unable to install after reboot and finishing the update it says it failed and started to roll back. Also tried all above steps and also manually downloaded and installed the MSU with no luk.

    Any suggestions ?

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  2. Paolo PB Bianco 20 Reputation points
    2025-12-18T15:00:46.7166667+00:00

    Unfortunately the solution suggested not solved my problem any other indication?

    Thanks

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