Windows 2.1x

Windows 2.1x is a family of Microsoft Windows graphical user interface-based operating environments.

Windows/286 2.10 and Windows/386 2.10 were released on May 27, 1988, less than a year after the release of Windows 2.0. These versions can take advantage of the specific features of the Intel 80286 and Intel 80386 processors. A hard disk was required for the first time to install Windows.