Suddenly today one of my computers wrote, at the login screen: “The handle is invalid”
It was not possbile to do anything, other than restarting the computer, but that did not help either.
I started the computer again, and waited for the “handle is invalid” message, hold down the shift key and pressed restart. Windows wrote “Please wait…” and suddenly it prepared updates, after that, it restarted, and then all worked again.
Guess it did not finish installing updates earlier 😉