Windows Basic

Windows Basic is the main theme on Windows Vista and Windows 7 Starter and Home Basic editions (where Windows Aero does not exist). It also may be used when the Aero theme is not working or to provide compatibility with older programs. The Basic theme can also be used on Windows 8/8.1 when  is not running. This theme is also present in Windows 8/8.1/10's Preinstallation Environment.