Windows for Workgroups 3.1 Beta 1

Windows for Workgroups 3.1 Beta 1 is the earliest known available build of Windows for Workgroups 3.1. It was leaked by Overdoze on 26 March 2021.

This build calls itself both Winball and Sparta, the codenames of Windows for Workgroups 3.1.

"3.2" references
WINBALL.SYS in this build has a version number of 3.2.026. It also contains a dialog claiming to identify the build as "Microsoft Windows Sparta v3.2.026 Pre-beta version". Long file name support also appears to be implemented in this driver; there is significantly more code and functions for this support than in later builds.