I have a Windows 2008 R2 server running as RDP Server. I enable GPO User Configuration > Administrative Templates > Start Menu and Taskbar > Remove and prevent access to the Shutdown, Restart, Sleep and Hibernate commands.
This worked and has remove those commands from the Start button, leaving Lock and Logoff.
However, when an user clicks Windows Security, the power button on the bottom right corner still has the options for restart and shutdown.
How can I remove that as well?