Volume Shadow Service crashes within NTDLL.DLL

I am trying to back up my disk with Dantz Retrospect using Open Volume Backup -- i.e. VSS disk images. This has worked well for over a year, but since August 3, 2024 I am getting this event in the Windows 10 Event viewer:

Faulting application name: vssvc.exe, version: 10.0.19041.4355

Faulting module name: ntdll.dll, version: 10.0.19041.4522

Exception code: 0xc0000374

Fault offset: 0x00000000000f

I have re-registered all the dlls.

I have rummaged around on ChatGPT and Copilot for suggestions. None of them identified or resolved the problem. I have run:

• scf /scannow
• other suggested utilities that I am not allowed to post here

I have re-installed Windows 10 and applied all the updates again.

I also get the same error if I try to create a Volume Shadow Copy "manually."

So, it seems to me that this may have been caused by the KB5040525 update? How do I figure out for sure what the problem is and how do I fix it? Copilot claims no one else has seen the problem.

Upgrading to Windows 11 is not an option as my hardware is not supported there.