General info

General information

Developer: Microsoft Corporation
In development: from 1982/1983 to 1987
Announced: 10th November 1983
Initial release: 1.01 (20th November 1985)
Latest release: 1.04 (April 1987)
End of support: 31st December 2001
Platform: x86 (IBM PC and compatibles, others - see OEM releases page)
Languages: English, French, German, Dutch, Italian, Japanese, possibly others
Initial price: $99
Distribution media: 5.25" or 3.5" floppy disks (depending on release)
Succeeded by: Windows 2.x


System requirements

Please note: these requirements are for the retail PC release only.

  • IBM PC or compatible system
  • 256 kB of memory
  • IBM CGA/EGA or Hercules-compatible display adapter and monitor
  • One or two 5.25" (or 3.5" in some releases) floppy disk drives
  • MS-DOS 2.0 or later
  • Pointing device and hard disk drive optional

You need at least one floppy disk drive and a hard disk drive with approximately 2 MB of free space to install on a hard disk drive. To install Windows on floppy disks, you need at least one floppy disk drive and two 5.25" 360 kB floppy disks. A mouse or some other pointing device is not required, but it is recommended for easier use. See Hardware > Pointing devices for a list of compatible pointing devices.

MS-DOS version 2.0 or later is required, though you will need to use the SETVER command for MS-DOS version 5.0 and later to avoid problems.