Windows 3.1 didn't have any "X" buttons. It had the system menu (the one shaped like a spacebar, since the hotkey was Alt-Space). If you quit Program Manager, i

Windows 3.1 didn't have any "X" buttons. It had the system menu (the one shaped like a spacebar, since the hotkey was Alt-Space). If you quit Program Manager, it would end the Windows session (since Program Manager was your shell). If you had a replacement shell (as some did back then, Norton Desktop etc), then quitting that would exit Windows and return to a pure DOS prompt.