Windows 8 build 7955

Windows 8 build 7955 is a pre-Milestone 3 Windows 8 build that leaked on BetaArchive on 2011-04-25.

Redpill
gus33000 on the BA Discord server managed to unlock the start screen of this build.

Aero
This build appears to have a slightly broken Windows Aero theme, with only the top portion of the window frame using the blur effect, leaving the side borders transparent.