Windows Longhorn build 4050 (private/lab06 demo.031019-1809)

Windows Longhorn build 4050 (private/lab06_demo.031019-1809) was shown during Jim Allchin’s keynote at PDC 2003. It demonstrated the WinFX powered Amazon application and its combined impact with the Avalon and WinFS aspects. It shares the same lab and build number as another build but this build leaked 1 day later.