We are running a Windows 10 pro 64bit computer next door, in French GUI and with more than 10 users. I am in charge (administrator user) but working in several places.
A few days ago, we started getting messages, when requesting to shut down: "Une autre personne utilise ce PC. Si vous arrêtez le PC maintenant, cette personne risque de perdre les données non enregistrées."
I believe (from a web-search) on a Windows with English GUI it would say this: "Someone else is still using this pc. If you restart now, they could lose unsaved work."
Under normal circumstances, I would consider this a very helpful and friendly message.
BUT: Why is there another user logged in, after she did a full shut down and after I (a day later) did a proper reboot? And how can any user (ever) be logged in after a re-boot if all users have a proper password and nobody has opted out of anything? We each use our passwords every time we boot and work.
edit1: I had a helpful comment and I entered netplwiz into the PowerShell: The "accounts window" had the following box unticked, which surprised me: "Les utilisateurs doivent entrer un nom d'utilisateur et un mot de passe pour utiliser cet ordinateur." (this means that users did NOT need to enter a user name and pw; and of course I ticked the box. So from now on pw will be enforced (again). Maybe this will fix our issue, I will do some testing now and will report here. end-of-edit1
When (after getting this new message and before shutting down (obviously)) I click on my avatar (which comes up when I click my start button) I can see in the list of users, that indeed Windows believes that one other user is logged in. It is the last user who was logged in before the shut down and the reboot.
This has happened for different users being followed by another user, so seems to be a system-wide problem, not limited to a certain userA - userB sequence.
For information: We have opted in the power settings to always do a full shut down, not a quick shut down, because we are in Africa and often have power issues or generally want no side-effects from "shortcuts".
When I opt to "ignore" this warning and go through with the shutdown, it looks and feels like a normal shutdown.
When I shut down and reboot and log-in twice under my own user, then I no longer have any other "ghost users" along. (this could be our work-around, but you will agree that we hope to understand and fix the issue)
The computer in question was very recently updated (via Media Creator Tool - and .iso option) to Windows 10 Version 1803 build 17134.48. I believe that the problem started a few days before the update, when we were in a video project together.
Another recent "change" that comes to mind: We just purchased and installed (before the Windows 10 update even) a Seagate "Backup Plus Hub" which is an external 3,5" 6TB HDD in its own case, with a USB3 connection to this computer. For the last ten days or so, we have always kept it connected and several users worked a lot on video projects on this drive. So the external files show up as an E:\ drive and do not "belong" to any specific user I believe. Normally this should not give us "haunted user log-ings", but just to be complete.
Why is this important to me: Seems that in our video project (using Shotcut and some other tools) there is one Shotcut project which is very messed up. And it keeps diagnosing itself as "damaged" and it keep recovering itself. I also use Shotcut on my own computer and have never seen such "damage plus recovery". So this could be one specific problem, which results from Windows either not un-logging users at shutdown time, or from unwanted background-logging-in-again of absent users. I hope we can fix the video-project problem, once we have fixed the Windows.