From there, the system runs a series of MS-DOS commands before displaying the Windows splash screen (followed by a "Stranger Things" version of the screen).

That concession was the foundation on which Microsoft would build its empire. Late last month, in Windows 10 Preview Build 14791, the command prompt was put out to pasture.

The only clue Microsoft is offering is that it will be "Introducing the all-new Windows 1.0, with MS-Dos Executive, Clock, and more".