Windows 92

Windows 92 was a modified version of Windows 3.1 released sometime in 1992, it mainly had an early version of the Chigaco UI later used in Windows 95, but used the Program Manager by default, it was the first version of Windows to be able to run without MS-DOS being installed first.

How to enable "Chigaco UI"
It's possible to replace the program manager with the Chigaco UI, you have to exit Windows and edit the WIN.INI file to add in the text "ALTUI=1".