Hi,
Thank you for posting in Microsoft Q&A forum.
1,The error 0x8007066A translates to: The upgrade cannot be installed by the Windows Installer service because the program to be upgraded may be missing, or the upgrade may update a different version of the program. Verify that the program to be upgraded exists on your computer and that you have the correct upgrade. Could be a number of reasons, are you running the latest update of the client?
2,A similar thread for your reference. The issue is resolved by Enabling Delta Content on the SCCM Client settings.
Windows 11 22H2 cumulative update fails 0x8007066A from Software Center

Thanks for your time. Have a nice day!
Best regards,
Simon
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