OK, let’s try one trick.
In the “config” folder at C:\Windows\System32\config, locate the current registry hive files …
system
software
security
sam
default
re-name them by appending .old to the filename
In C:\Windows\System32\config\RegBack folder you can find registry backup files:
system
software
security
sam
default
Copy them into C:\Windows\System32\config folder
On completion try a reboot to normal windows.