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Error 0x800f0838 when trying to install February Patch Tuesday using .MSU file

Anonymous
2025-02-12T00:34:16+00:00

As the title says, I've downloaded the February 11, 2025 Patch Tuesday update (KB5051987) from the Microsoft Update Catalog and when I run it, it asks me if I want to install it, I click Yes, it says "copying files to cache" or something like that, and then it suddendly throws error 0x800f0838, period.

  • The file isn't corrupted, its digital signature is valid,
  • I've restarted the PC,
  • I've run sfc /scannow,
  • I've tried using DISM,

and nothing. Is anyone else having the same issue or is it just me?

Windows for home | Windows 11 | Windows update

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  1. Ramesh 176.1K Reputation points Volunteer Moderator
    2025-02-12T02:39:29+00:00

    Please install the checkpoint update, a prerequisite for KB5051987, when using the offline installer. windows11.0-kb5043080-x64_953449672073f8fb99badb4cc6d5d7849b9c83e8.msu

    Then, install KB5051987: windows11.0-kb5051987-x64_199ed7806a74fe78e3b0ef4f2073760000f71972.msu

    If that doesn't work, use Microsoft's instructions below.

    ********************

    To get the standalone package(s) for this update, go to the Microsoft Update Catalog website. This KB contains one or more MSU files that must be installed in order.​​​​​​​

    Install this update

    Method 1: Install all MSU files together

    Download all MSU files for KB5051987 from Microsoft Update Catalog and place them in the same folder (for example, C:/Packages). Use Deployment Image Servicing and Management (DISM.exe) to install the target update. DISM will use the folder specified in PackagePath to discover and install one or more prerequisite MSU files as needed.

    Updating Windows PC

    To apply this update to a running Windows PC, run the following command from an elevated Command Prompt:

    DISM /Online /Add-Package /PackagePath:c:\packages\Windows11.0-KB5051987-x64.msu

    Or, run the following command from an elevated Windows PowerShell prompt:

    Add-WindowsPackage -Online -PackagePath "c:\packages\Windows11.0-KB5051987-x64.msu"

    ********************

    Source: February 11, 2025—KB5051987 (OS Build 26100.3194) - Microsoft Support: https://support.microsoft.com/en-us/topic/february-11-2025-kb5051987-os-build-26100-3194-63fb007d-3f52-4b47-85ea-28414a24be2d#ID0ELBD=Catalog

    7 people found this answer helpful.
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  2. Ramesh 176.1K Reputation points Volunteer Moderator
    2025-02-12T03:24:33+00:00

    As I said before, I've already used DISM, doesn't work.

    I think you missed the point. You must download both ,msu files and run DISM. Did you do that, exactly? "I ran DISM" is pretty vague. We don't what how and what command-line arguments you used and whether you downloaded both .msu packages or not. It's not helpful.

    Do I still need to install the pre-requisite update even if my current build is the previous month's preview update (26100.3037)? I'm not on an old build, my system is completely up-to-date.

    Yes. If you're going to install it using .msu, you must install the checkpoint update. It was introduced in 24H2.

    6 people found this answer helpful.
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  3. Anonymous
    2025-02-12T03:14:10+00:00

    As I said before, I've already used DISM, doesn't work.

    Do I still need to install the pre-requisite update even if my current build is the previous month's preview update (26100.3037)? I'm not on an old build, my system is completely up-to-date.

    2 people found this answer helpful.
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