Cumulative Updates Failing After 24H2 Upgrade

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We started upgrading our Windows 11 computers to 24H2 in November. After the upgrade I noticed a high number of failures when applying the November 24H2 cumulative. Here we are in Dec and we’re still seeing a high number of update failures with the Dec 24H2 cumulative. Is anyone else experiencing issues with the 24H2 cumulative updates after the upgrade?

I tried to manually install on a few of the computers that were failing and it errors out with the error "Windows Update Standalone Installer: installer encountered an error 0x800f0838. I tried a number of fixes typically used to cleanup the windows update directory, DISM, etc. Nothing would work.

I then noticed if you try to download the latest DEC Cumulative from the Microsoft Update Catalog website there are two updates listed there. The first is a September 24H2 update KB5043080 and the DEC 24H2 Cumulative KB5048667. I found that if you install KB5043080 which is the September 24H2 cumulative you can then install the DEC 24H2 cumulative without error.

You would think that September 24H2 cumulative would be included in the 24H2 iso I downloaded from Microsoft in October after they officially released 24H2. I noticed KB5043080 is not in the BigFix console. Should that be added or possibly bundled with the Dec 24 Cumulative?

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@cody_gregg We have noticed the same issue. It is very strange that Microsoft lists them together in the update catalog instead of making the KB truly cumulative. We are unable to find any mention from the MS side about this issue.

Screenshot 2024-12-13 091746
Screenshot 2024-12-13 091746638×523 16.3 KB

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I’m relieved to see I’m not the only one encountering this. There isn’t much information available online about it either. I ended up creating a custom task in BigFix to deploy KB5043080 from September since no fixlet exists for it in BES. I just finished testing the deployment on a few computers at my desk, and they updated successfully. After pushing it out, the December updates installed without any issues. I’m now preparing to pilot this with our beta group.

I figured there would be more people complaining at this point. It could be that a lot of other companies have yet to deploy the 24H2 upgrade is my guess.

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Here’s a possible explanation: “Checkpoint cumulative updates”, a new feature that comes with Win11 24H2. It is meant to reduce the size of monthly updates.

Windows 11 24H2 updates might fail due to “Operation is not supported” after KB5043080

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That’s the exact article where I had found the information.