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Windows Server 2016 – Cumulative Update (KB5061010) Fails with Error 0x80073701

Jegan 0 Reputation points
2025-07-01T08:43:25.9666667+00:00

Hi Microsoft Community,

I'm currently facing an issue while trying to update a Windows Server 2016 machine. The installation of Cumulative Update KB5061010 (June 2025) repeatedly fails with the following error:

Error Code: 0x80073701 – ERROR_SXS_ASSEMBLY_MISSING

System Info:

OS: Windows Server 2016 Standard (fully activated)

Environment: Physical server

Current Updates: All previous cumulative and servicing stack updates were installed successfully

Update Method Tried:

Windows Update (auto and manual)

  Manual installation via `.msu` file from Microsoft Catalog

Troubleshooting Steps Tried:

  1. Ran sfc /scannow – no integrity violations
  2. Tried DISM /Online /Cleanup-Image /RestoreHealth – received Error 87
  3. Enabled and started TrustedInstaller
  4. Reset Windows Update components
  5. Attempted to use ISO repair source with install.wim and install.esd, still no success
  6. DISM also throws Error 87, even in PowerShell

Request for Help:

  • What is the best way to resolve this update failure?
  • How can I repair the servicing stack if DISM is not functioning?
  • Are there any known issues with KB5061010 on Server 2016?

Any guidance from the community or Microsoft team would be greatly appreciated.
Thank you!

Windows for business | Windows Server | Devices and deployment | Install Windows updates, features, or roles
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  1. Oliver Nguyen 0 Reputation points
    2025-07-02T16:01:21.0466667+00:00

    Hi Jegan,

    Hope you are doing well.

    Please open the CBS.log to find the error code.

    For the first question:

    • Verify correct DISM syntax with proper install.wim source
    • Ensure latest SSU (e.g., KB5039283) is installed
    • Clear SoftwareDistribution and Catroot2 folders
    • Try installing .cab file using DISM
    • Consider in-place upgrade if all else fails

    For the second question:

    Manual SSU installation via .msu can work independently.

    Steps:

    Run in elevated Command Prompt:

    wusa.exe KB5039283-x64.msu /quiet /norestart

    For the third question:

    Yes, there is a documented and confirmed issue with KB5061010 on Windows Server 2016 but with DHCP which is related to network problem.

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