Windows 1.0 is a 16-bit graphical operating environment that was released on November 20th 1985.[1] It was Microsoft's first attempt to implement a multi-tasking graphical user interface-based operating environment on the PC platform. Windows 1.0 was the first version of Windows launched. It was succeeded by Windows 2.0.
Link to full article: http://www.securityfreak.info/entertainment/windows-1-0-introduction-history
This is the download link for Windows 1.0!
http://cip5p52lqmufd3kc.onion/file/53N876
To download the file you are going to need the Tor browser.