Group Policy is an extremely usefully administrative tool. You can use group policies to restrict what access to resources users on your network will have access to. If you want to restrict a user’s ability to make configuration changes to a system, you can do it by creating a group policy that applies to his/her user account or computer. The ability to create and apply group policies on your domain is indispensable for an administrator. Windows Server 2008 makes working with group policies much more efficient and easy.
In this tutorial I create a group policy to restrict access to all removable media devices