The Windows 3.1 runtime used in the final version of Windows 95 setup included everything required to "do graphics" under MS-DOS, Chen explained, and it was fully debugged with its own video ...

The setup process differed based on the environment in which the application was run. If starting in MS-DOS, the setup program would install and boot a minimal version of Windows 3.1 and then fire ...

Writing The Old New Thing blog, he said Windows 95 setup was designed to upgrade systems from three possible starting points – MS-DOS, Windows 3.1, and Windows 95 itself.