Windows 1.0

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Windows 1.0
Version of Microsoft Windows
Windows logo and wordmark - 1985.svg
Windows1-1.01-DesktopVESA.png
OS family16-bit Windows
Version1.0
Codename
Preliminary nameInterface Manager
Architecturex86 16-bit
Latest build1.04
Release dateNovember 20, 1985
Support endDecember 31, 2001
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]

The development of Windows started as early as 1983 when Bill Gates felt the danger of rival companies like VisiCorp, which started to make their graphical systems to handle multitasking apps. The first compiled build of Windows known to exist was a build shown in 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...

  • Windows 1.0 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 design of the overlapping windows.

References[edit | edit source]