|Microsoft Windows 1.0|
|Release date||20th November 1985|
|Support end||31st December 2001|
Microsoft Windows 1.0 is the first version of Microsoft Windows that was released on the 20th of November 1985, and was made available for users of IBM and COMPAQ personal computers running Microsoft MS-DOS and IBM DOS.
Originally, Microsoft started work on a new graphical environment for MS-DOS-based personal computers, known as "Interface Manager". This environment would include support for existing MS-DOS-based applications, as well as GUI applications that were specifically designed for the new environment.
Later, at COMDEX 1983 in November, Microsoft demonstrated a new upcoming product, "Microsoft Windows", running on a personal computer with monochrome graphics, and with various applications running alongside each other in "windows".
During the course of its development, several pre-release versions of Microsoft Windows were also made available to testers and developers, including a "Development Release #5" from around November 1984, as well as later pre-release versions such as those from January 1985 (Alpha), May 1985 (Beta), and Premiere Edition in July 1985.
A final preliminary release, Premiere Edition (1.00), was released to a group of users for testing Windows prior to its release. Windows 1.01, released on 20th November 1985, was the first version of Windows to be released to general availability, whereas several more versions, Windows 1.02 and Windows 1.03, were released as more changes were made to Windows, up to, 1.04, which was released in April 1987, the latter of which also added support for the newly introduced IBM PS/2 series of personal computers which was released at that same time.
Several versions in other languages, such as Windows 1.03 in German and French and Windows 1.03 Japanese for the NEC PC-9801, were also released, as well as OEM versions such as a version of Windows 1.01 for Zenith personal computers, as well as versions of Windows 1.03 for Olivetti and Siemens machines.
Pre-release and development
Early builds of Microsoft Windows include the early Interface Manager environment, as well as the demonstration at COMDEX 1983, along with subsequent pre-release versions of Microsoft Windows that were shipped prior to release.
- BYTE magazine demonstration
- COMDEX 1983 demonstration
- April 1984 build
- Development Release #1 (DR1) (May 1984)
- Development Release #2 (DR2) (June 1984)
- Late Tandy 2000 build
- Development Release #5 (DR5) (November 1984) ✔
- Alpha Release (January 1985) ✔
- Beta Release (May 1985) ✔
- Preliminary Version 0.50 (June 1985)
- Premiere Edition (July 1985) ✔
- 1.xx/1.xy (September 1985) ✔
- "PC Magazine" demonstration
Microsoft Windows 1.01
Microsoft Windows 1.02
Microsoft Windows 1.03
Microsoft Windows 1.04
In late 1983 (over two years before Windows 1.0 was actually released), Microsoft sent out press kits which contained a squeegee (window washer) and a washcloth. It also contained an invitation to attend a press conference in New York on November 10, 1983, where the official name of Windows was released.
- Microsoft Windows 1.0 advertisement with Steve Ballmer
- History of Microsoft - 1985 (see 2:02 to 8:39 for Microsoft Windows 1.0)