Thankyou PreciousLeb for your reply.
I'm not disappointed. (Whatever made you think I was? Anyway.)
I was simply reporting that, like Mon.k11, I was seeing something that looked incorrect to me, with some details of the circumstances, in case anyone in Microsoft wished to investigate it further.
I did say that it was no big deal for us, and it isn't. If you think the problem is local to our situation, not widespread, and not worth following up, that's ok, that's your choice. The Fall Creators Update is otherwise working well for us so far as I can
tell, I am relieved to say.
Thankyou for your suggestion about rolling back to the previous version, but really that would be a sledgehammer to crack a nut. I haven't got the time to spend messing about like that, and as this machine is the only one we have, the less risk we take with
it, the better. We always know which of us is signed in and who isn't, and if we simply have to click "Shut down anyway" when necessary, we'll just do that.
Best wishes, Terry