From the error code 0x800f0923 during the installation of KB5075904, this usually indicates that the update process is encountering a driver compatibility issue or a component conflict during the reboot phase.
A good first step would be to check the C:$WINDOWS.~BT\Sources\Panther folder and review the setuperr.log and setupact.log files. These logs typically identify the exact driver or component that is blocking the update. I’d also recommend running the following commands to repair any potential component store corruption before attempting the update again:
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DISM /Online /Cleanup-Image /RestoreHealth -
sfc /scannow
After that, reboot the server and try installing the update again. If the issue persists, another useful approach is to temporarily disconnect non-essential hardware or update older drivers, especially storage, network, or security drivers, as those are commonly involved with this specific error. In some environments, performing the update using the latest Servicing Stack Update (SSU) and installing the cumulative update manually from the Microsoft Update Catalog can also help bypass the problem.
Additionally, you can run DISM /Online /Get-Packages | findstr KB5075904 to confirm whether the package is partially staged or left in a pending state after rollback. If it is, clearing the pending actions with DISM /Online /Cleanup-Image /StartComponentCleanup may help before retrying the installation.
Please try and let me know how it goes . And if this answer helps point you in the right direction, please consider clicking "Accept Answer" so others facing the same issue can find the solution easily . If you need more information, feel free to leave a message.