Unable to install Windows 11, version 24H2 update

Lapmargin: 0;">Dell XPS 9520

Windows 11 Pro

Version: 23H2 

For the past week I have been trying to install the Windows 11, version 24H2 update. Keep getting error messages as follows: 

- We could not update the system reserved partition 

- Install error:  Install error - 0xc1900200 

All the following tests were negative:

- sfc /scannow - it found and fixed a couple of items the first time through, and then no errors on subsequent passes

- memtest86 - several passes

- Ran Dell's diagnostics from website and SupportAssistant app - no errors

- suspended antivirus and tried installing but same result.

 Appreciate any guidance. Thank you.