Windows 1.0

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Windows 1.0
Version of Microsoft Windows
OS family16-bit Windows
Preliminary name
Architecturex86 16-bit
Latest build1.04
Release date1985-11-20
Support end2001-12-31
Replaced by
Windows 2.x

Windows 1.0 is the first version of Microsoft Windows, announced on 1983-11-10 and finally released to retail stores on 1985-11-20.

According to Microsoft, Windows 1.0 is a 16-bit "Operating Environment" designed to run on top of MS-DOS and is not a standalone operating system. This version was succeeded by Windows 2.x.

Development[edit | edit source]

Development of Windows started as early as 1983 when Bill Gates felt the danger of rival companies like VisiCorp, which started to make their own graphical systems to handle multi-tasking apps. The first compiled build of Windows known to exist was a build shown in the BYTE magazine. At first, it was intended to be called Interface Manager, then Microsoft Desktop [1], but the name was changed to Microsoft Windows before the official announcement.

Builds[edit | edit source]

Pre-DR5[edit | edit source]

Pre-release[edit | edit source]

RTM[edit | edit source]

Trivia[edit | edit source]

Did you know...

  • It was the longest supported version of Windows by Microsoft? It was supported for 16 years until 2001-12-31
  • When Windows 1.0 tries to show a date with the year 2000, it actually shows it as 100? Similarly, 2020 → 120
  • This is the only version of Windows by Microsoft to not have overlapping windows on the desktop, this was due to Apple copyrighting the overlapping windows design.

References[edit | edit source]