The fixed suggest there does not work.
version was How to fix Windows Spotlight Lock screen errors on Windows 10
Played around with this and put the resetting Spotlight settings in the middle. But no progress.
Looked at Windows Spotlight/Lock screen
Changing the app from calendar to weather did not change anything.
Tried Fixing the Windows 10 Pre-Login Background Screen https://mergy.org/2016/05/fixing-the-windows-10-pre-login-background-screen/
Could not get control of SystemData folder
Disable all the non Microsoft programs No help
Tried reinstalling Windows 10. Looked OK until computer was added to the domain but another same type of computer on the domain does not have the problem.
Tried How to Reset and Re-register Windows Spotlight in Windows 10
Have checked local group policy settings