Windows 11 version 24H2 update fails with error code 0x80070002

My Acer Predator PHN18-71 (Windows 11 version 23H2, Intel Core i7-14700HX, NVIDIA GeForce RTX 4070) has been trying to install the Windows 11 version 24H2 update since it first appeared in my Check for Updates window a few months ago. The update always fails, listing error code 0x80070002 as the broad issue. I have, to the best of my ability, researched all the recommended things to try to make this update succeed:

Check Time Settings

Update drivers

Run the Windows Update Troubleshooter

Rename the Software Distribution and catroot2 Folders

Restart Windows Update Service

Check System Files with DISM for inconsistencies

I'm sure that I'm missing a few - I'll try to flesh out my list.

Yesterday I made a fresh backup image of my C: drive and performed an iso file 24H2 installation. It failed, so I ran SetupDiag. It responded with only one issue:

"Error: SetupDiag reports a fatal error on driver migrations. ErrorCode: 0x80070002"

I have the zip folder of files produced by SetupDiag.

The only clue I have to a possible source of this problem is that my computer's audio system is malfunctioning. These issues began after my machine started failing system updates. I can't get any sound out of my laptop's speakers or my headphone jack. I have to use USB speakers or a USB external sound card to get any audio output, which apparently also requires disabling the Microsoft High Definition Audio Device (otherwise I get no audio from any source). The Realtek Audio Driver has stopped appearing in my Device Manager even though it says it is installed after I reinstall it from the Acer website. The Realtek Audio Console window is now empty except for this:

"Realtek Audio Console doesn't support for this machine."

It used to be full of controls that functioned.

The Intel Smart Sound Technology BUS in Device Manager shows error code 39:

"Windows cannot load the device driver for this hardware. The driver may be corrupted or missing."

No other drivers show any errors in Device Manager.

I've seen multiple people post online about this apparent audio driver / failed update issue with very similar symptoms. But I haven't seen how or if they resolved them.

I'm admittedly not a very capable or experienced system administrator. I'd appreciate any help I can get to resolve these issues.