Windows Premiere edition

Windows Premiere edition, also known as Windows 10.0 internally, is an early version of Windows, infamous for its rarity in psychical form, its meant to show off what Microsoft was working on for their at the time upcoming Windows 10.1, which was the anticipated follow up to Windows 0.5. It had a very limited release initially in 1985 but was later bundled with certain PCs from 1986 to 1992 by accident in place of the regular Windows 1.01.

Features
It has most of the same features as Windows 1.01, but buggier and much more incomplete, it was mainly made to show off the multitasking capabilities that Windows 1.01 had.

Trivia

 * According to finance documents from Microsoft v Banks, It was supposed to leave any testing stages after May 1986 as Windows 1.1, but it never happened due to a staff member leaving the development team and later disappeared and no where to be found.