Administrative Templates for Windows PowerShell

Windows PowerShell supports a Group Policy setting ("Turn on script execution") that sets the execution policy for Windows PowerShell. This setting can prevent users from running scripts that are downloaded from the Internet or from sources other than trusted publishers. It can also prevent users from running any scripts; however, it allows users to run interactive commands.
From this page, you can download a Microsoft Windows Installer that contains the PowerShell Execution Policy.adm, Administrative template files populate user interface settings in the Group Policy Object Editor, enabling administrators to manage policy settings.