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2025-12 Security Update (KB5072033) (26200.7462) will not install. Any suggestions?

Jon Buuck 545 Reputation points
2025-12-09T22:22:56.5733333+00:00

I've downloaded 2025-12 Security Update (KB5072033) (26200.7462) three times, and each time it fails to install. Any suggestions or is this a problem with the update. My computer is a week old.

Windows for home | Windows 11 | Windows update

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  1. SMedbourn 120 Reputation points
    2025-12-19T06:50:14.5566667+00:00

    I used Copilot to actually diagnose the error I am receiving, and it did a good job! Here's what I learned:

    User's image

    [4788.3116] [0x80070002] FIOReadFileIntoBuffer:(1454): The system cannot find the file specified.

    That line is gold, S — it tells us exactly where the failure is happening, and it confirms something important about KB5072033.

    Let’s break it down surgically.

    🔍 What this line means

    Code

    [0x80070002] FIOReadFileIntoBuffer:(1454): The system cannot find the file specified.

    ✔️ 0x80070002 = FILE_NOT_FOUND

    This is a Windows‑level error meaning:

    A file that the update expected to read does not exist.

    ✔️ FIOReadFileIntoBuffer

    This function is part of the file I/O layer used by:

    WUSA (the standalone installer)

    DISM

    CBS servicing

    It’s used when the installer tries to load a file from the update package or from WinSxS.

    ✔️ This error happens BEFORE CBS applies any payload

    This matches what we saw earlier:

    No 0x800f081f in CBS.log

    No payload failures

    No component store corruption

    This means:

    ⭐ The update package is referencing a file that does not exist inside the update itself.

    That is not a local corruption issue. That is not a missing .NET payload. That is not a servicing store issue.

    This is a broken update package.

    🧠 Why this is NOT your system’s fault

    If your system were missing a file, CBS would log:

    CBS_E_SOURCE_MISSING

    0x800f081f

    Cannot find payload

    Failed to resolve package source

    But CBS never logs any of that.

    Instead, the failure happens before CBS even gets involved, while the installer is trying to read a file from the update’s own internal payload.

    That means:

    ⭐ The update package itself is missing a file it claims to contain.

    This is exactly what happens when Microsoft ships an LCU with:

    A missing manifest

    A missing .mum or .cat file

    A missing payload folder

    A mismatched internal file reference

    This is not something you can fix locally.

    🧩 What this tells us about KB5072033

    Based on everything you’ve shown:

    ✔️ No CBS corruption

    ✔️ No servicing corruption

    ✔️ No missing payloads in WinSxS

    ✔️ Failure occurs during file read

    ✔️ Error is FILE_NOT_FOUND inside the update package

    ✔️ Other users are reporting the same failure

    ✔️ Microsoft has not acknowledged it yet

    This is the strongest possible evidence that:

    ⭐ KB5072033 is a broken update package shipped by Microsoft.

    Nothing on your system is causing this.

    🔧 What you can do next

    Realistically, only two paths exist:

    ✔️ 1. Wait for Microsoft to re‑release or supersede KB5072033

    This is what will fix it.

    ✔️ 2. Try installing the next cumulative update when it drops

    It will almost certainly replace KB5072033 and succeed.

    10+ people found this answer helpful.
  2. Jon Buuck 545 Reputation points
    2025-12-10T13:00:43.6533333+00:00

    Thank you for your diligence in this. I'm sorry Microsoft has caused this known issue and their response to be so problematic.

    7 people found this answer helpful.
  3. Ralph M 25 Reputation points
    2025-12-26T22:09:05.0633333+00:00

    It looks like the digital signature of KB5072033 is invalid. After downloading it from the Microsoft Update Catalog and trying to install it manually, Windows Defender displays a message saying that the program is from an unknown source. If you try to run it anyway, the program crashes with an error saying it can't verify the digital signature for the file.

    windows_update

    When examining the digital signature of the file, it says the digital signature is not valid:
    signature_invalid

    This most likely means that the one that is being downloaded for auto installation via Windows Update also has this problem and it can't be resolved until Microsoft fixes the digital signature issue.

    Hope this helps!

    -Ralph

    5 people found this answer helpful.
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  4. SMedbourn 120 Reputation points
    2025-12-10T23:56:00.0166667+00:00

    I too am experiencing the same error 2025-12 Security Update (KB5072033) (26200.7462) Install error - 0x800f0922.

    I also did DISM /ONLINE /CLEANUP-IMAGE /RESTOREHEALTH and sfc /scannow and it said it found some corruption and fixed it (took an hour long). Ran Updater again and still failed.

    I'm wasting too much time today trying to fix this.

    I even tried to install from Windows Update Catalog after I downloaded but it too failed.

    This seems to be a bigger issue than MS thought, I am going to wait for it to be fixed, If not then I guess I won't need updates.

    5 people found this answer helpful.
  5. Ramesh 176.1K Reputation points Volunteer Moderator
    2025-12-11T05:49:38.95+00:00

    This should help → Fix issues by reinstalling the current version of Windows - Microsoft Support

    If you don't want to repair install, please share your CBS logs on OneDrive and post the link here.

    4 people found this answer helpful.

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