Disable cmd and PowerShell on Windows Server 2012 for clients


I'm using Windows Server 2012, and I want to disable the cmd and the PowerShell for the clients. I've searched in the Group Policies but i didn't find where I can do this. Please can somebody help me?

User Cfg - Admin Templates - System - Prevent access to the command prompt

Prevents users from running the interactive command prompt, Cmd.exe. This setting also determines whether batch files (.cmd and .bat) can run on the computer.

If you enable this setting and the user tries to open a command window, the system displays a message explaining that a setting prevents the action.

Note: Do not prevent the computer from running batch files if the computer uses logon, logoff, startup, or shutdown batch file scripts, or for users that use Terminal Services.

I have no idea about powershell anything. I ignore abominations.