Windows Longhorn build 3706

Windows "Longhorn" build 3706 (with a build tag of 3706.Lab06 N.021029-1731) is a Milestone 3 build of the Microsoft Windows "Longhorn" operating system. It is the first build to include the Desktop Composition Engine, which provides window transparency and visual effects.

If the Windows Sidebar is enabled in this build, the Start menu becomes attached to the Sidebar itself.