You log on the computer by using a new user account. You apply the Group Policy settings to a computer that is running Windows 7 or Windows Server 2008 R2. You enable the Prevent changing desktop background Group Policy setting. The theme has a configuration that changes the wallpaper in an interval. You enable the Load a specific theme Group Policy setting and point to the path of a valid theme file. Windows 7 Service Pack 1 Windows Server 2008 R2 Service Pack 1 More.
