Hello
Thank you for posting in Q&A forum.
You can try to create a scheduled task via GPO and applied to all the users.
GPO | Schedule Automatic Shutdown (std.rocks)
If you define the command: shutdown /s /t 3600, it will shut down in 60 minutes (3600 means 3600 seconds).
If you define the task will run at 9:00 PM at one certain day with shutdown /s /t 3600, and it will appear this notification at 9:00 PM that day, and then it will shut down the machine at 10:00 PM.
I hope the information above is helpful.
If you have any questions or concerns, please feel free to let us know.
Best Regards,
Daisy Zhou
============================================
If the Answer is helpful, please click "Accept Answer" and upvote it.