Release of Windows 1.0

Date: November 20, 1985 • Location: Washington, United States

Windows 1.0, the first version of Microsoft Windows available to the public, was released.

Windows 1.0 is the first major release of Microsoft Windows, a family of graphical user shells and operating systems for personal computers developed by Microsoft. It was first released to manufacturing in the United States and the general public on November 20, 1985, while the European version was released as Windows 1.02 in May 1986.