No. 1.0α

this operating system was made by alpha soft.

Alphasoft lived until Microsoft revived, and Centaurosoft hidden that alphasoft was on the team.

It was the longest-living operating system of windows, now called "no." the first operating system using this name was No. 0_0. And that operating system called No. 0_0 was made by MIC Redux, founded by the last person on Earth ,and aliens technically created it. So last person on Earth could have read future. When the world died, there was an operating system planned to be released before the universe died.

This operating system was called Windows End Of The World.

Microsoft also made Windows No. 0 0, which was the operating system showcasing that MIC Redux would take over, and even made No. 2.0α.