Looking for software that would enable me to cast a screen over LAN I'm working at the university in a computer lab and I'm looking for a Microsoft Windows software, that would enable me to cast a screen of my computer (master) to all other student's computers which are in the same local network.

I have already found several different solutions, but none of them enables me to force the slave computers to start the screen casting software. 

The idea here is, when I'm showing something on my computer I would start the screen casting software on all slave computers, and students won't be able to close this window until i'm done.
Does software like this exist?
I know of two bits of software that can do what you want.
They do what you are looking for, display stuff on their screen and do demonstrations on their screen. They also lets you spy on your pupils, blank screens, lock screens (useful if they are not paying attention), and shutdown computers at end of day.
AB Tutor
I have used this software, in the schools I have worked in.
On the negative side it is proprietary, and expensive.
Veyon
I have not used it. But it is Free Software and cheep.
See http://veyon.io/