Leaked version of Windows 7 M3 that Microsoft has never released

An old and unreleased beta build of Windows 7 has just leaked online, attracting the attention of Windows history buffs and Win32 software developers.

This build, named build 6758, was compiled in July 2008, about a year before the official release of Windows 7 RTM. Build 6758 provides an interesting look at the evolution of Windows 7 and with some notable changes compared to previous builds.

Interface of Windows 7 M3 version (build 6758).

According to BetaWiki, a website that tracks Windows history, build 6758 includes improvements to the Windows Explorer user interface, Start Menu, Desktop Window Manager and more. Highlights are that the Start Menu is updated to include links to the user's documents, photo library, and videos by default, while Desktop Window Manager has eye-catching animations for the Aero Snap feature.

Additionally, this build includes an updated version of Paint similar to the RTM version, an Internet Explorer application with new interface elements, and several media-related programs such as Windows Media Center, Windows Media Player and Windows DVD Maker.

Build 6758 is an exciting opportunity to experience Windows 7 in its early development stages and explore the changes that have been made before the final version launches.

However, it should be noted that this build is old and may not be compatible with all modern hardware or software. Users should consider carefully before installing and running this build on their primary system.