1 nov 1984 - Windows 1.0 Developer Release 5

Description:

Windows 1.0 Development Release #5 is a pre-release build of Windows 1.0. This build is the fifth in the Development Release series, intended to help application developers design and develop their applications to work with Windows. As such, it contains sample apps (some of them even with source code). According to INSTALL.BAT, it was compiled on 1984-11-01. It is the earliest leaked build of Windows so far.

By default, this build is installed to C:\windows\test, with development resources in C:\windows\bin. Resources are stored in .res files outisde of the executables. The overall UI design philosophy was not developed yet, which can be seen in dialogs - some use a menu bar rather than OK and Cancel buttons.