Program Manager

Program Manager (also known as ) is the default shell used in Windows 3.0, Windows 3.1x, Windows NT 3.1 and Windows NT 3.5x. It has been replaced by the Windows Explorer in Windows 95, however, the Setup still included a "Windows 3.1 user interface" option, which launched the Program Manager at startup with the Explorer shell. Later Windows versions removed that option, however, the executable was still included for compatibility purposes. It was replaced by a compatibility stub in Windows XP Service Pack 2, followed by Windows Vista removing the executable completely.