by lunarg on July 2nd 2012, at 13:59

For the proper application of all parts of a GPO, including the Group Policy Preferences (GPP), you need to install the right client on your client computers. You can find a list of download links below.

Starting from Vista SP2, you no longer need to install the client. Windows 2008, Windows 2008R2 and Windows 7 already have the client by default, so no updates are required on those platforms.