Lightroom Classic repeatedly (10x per sec) pings a Tcpip\...\EnableDhcp item in the registry and hangs on closing

I’ve tried every twist possible. I have lots of details (pasted here) and will attach a diagnostic zip file.

I’m having trouble with Lightroom Classic 15.x upon closing. The LrC window closes but LrC hangs as a very active background process. I’ve done a lot of testing and reinstalling and I’m looking for an under-the-hood solution to the problem. Please! Here is what I have, and the steps taken so far.

System: Windows 11 Pro
LrC 15.1, 15.1.1 and 15.2, (have tested all three versions)
NVIDIA GeForce RTX 3060, driver up to date, per Windows Update: 32.0.15.9144
Primary LrC catalog on internal SSD (Drive X:)

Problem: When LrC window closes and hangs as background process, Windows Process Monitor shows hits at a rate of 8-10 per sec to
RegQueryValue on

HKLM\System\CurrentControlSet\Services\Tcpip\Parameters\Interfaces\
{6a90529f-eb48-11f0-9d67-806e6f6e6963}\EnableDhcp

Result → "NAME NOT FOUND"

Two Work Arounds – Neither is viable long term:

• In a new Windows 11 profile named “Test,” I launched and shut down LrC with no hang. Shutdown was clean and complete. Again, not a long-term solution for my system and my workflow.
• End Task in Windows Task Manager; not practical

What I Have Eliminated:

• Within Windows Device Manager, enable/disable NVIDIA display adapter:
   → hang problem remains
• There are no hidden or disabled network adapters
• Moved existing LrC AppData folders to allow LrC to create new files:
  → hang problem remains
• Was running LrC 15.1.1 when problem began, upgraded to 15.2, then downgraded to 15.1 → no change
• Sync On/Sync paused → no change
• With every significant change I’ve done a cold system reboot

Going Forward:

• I am told this ID appearing in repeated registry hits is an important clue
  {6a90529f-eb48-11f0-9d67-806e6f6e6963}
  I am willing to send you a more complete Process Monitor log if you guide me with some specific how-to steps and what I should/should not filter for.
• I am a careful person and not afraid to edit the Windows registry.
• I don’t want to use the Creative Cloud cleaning tool without hearing from someone with perhaps a better quicker solution. Also, I want to know more than what the Adobe support page provides in terms of exactly what the cleaning tool will change or delete on my system. Uninterrupted workflow is important.

Hoping very much this will point to a known fix. I’m on a three-month-old PC, I’ve already had to reinstall Windows and all my apps due to a Win 11 printing bug, and I really don’t want to do any more re-installs if possible.
Thanks.
Frank M

Sorry, I can’t uploadthe file LrSyncDiagnostic.zip because it is 154MB.