Windows 1.0 Preliminary Version 0.50

Windows 1.0 Preliminary Version 0.50 is a pre-release build of Windows 1.0. BetaArchive member ComputerHunter found the logo file for this build on disk 3 of Premiere Edition on 2020-06-19. The file  (similar to   in later builds) was recovered, as well as part of a fragmented , which includes   and.

This build may have been made around early 1985-04, based on the remaining file dates also observed on the disk. The MS-DOS Executive menus already appear to be the same as in the May Beta. It also features an About dialog which reports the amount of free disk space remaining, suggesting this build may be newer than the "InfoWorld 1985-07-01" one.