Student's monitor is still showing teacher's content

[linis]

When I end my teaching, some students' monitor are still showing my contet.
How to solve this problem?

All my computers are windows 10.
There are 1 teacher PC and 30 studeut PC in my classroom.

[DrewLoker]

@linis I routinely have this challenge as well.

When I stop DEMO, the students are locked out of their computer...non-responsive...or the START bar disappears. It seems that Windows 11 has Crashed.

Sometimes clicking DEMO again, then back off works, but quite often, nearly every student in the classroom has to restart their computer. I am having to refrain from using Demo once again.

Anybody else?