how to disable user to install game?

[J.]

how to disable user to install game?
such as: http://lf2.net/download_en2.html

I have already disable the "Windows Installer",
but they can still install this game.

Thanks

 

[Amnon Feiner]

how to disable user to install game?
such as: http://lf2.net/download_en2.html

I have already disable the "Windows Installer",
but they can still install this game.

Thanks

Are they logged on with admin rights? make then regular users.

 

[J.]

Thank you for your reply.
They are not with admin right, only users