Windows Longhorn build 4039 (Lab06 n.030827-1717)

Windows "Longhorn" build 4039 (with a build tag of 4039.Lab06_n.030827-1717) is a build of the Microsoft Windows "Longhorn" operating system, and among the first to include a working version of the Windows Aero visual style. Other features in this build include an updated Plex theme, a prototype of the Phodeo feature, and a new Communication History shell folder.

In this mid-Milestone 6 build, Explorer windows have somewhat been updated. However, this build returns to being unstable, which is slightly normal since they were planning to change the theme.

For all its instabilities, the DWM is known to work in this build and can even render Aero transparency, although it is extremely glitchy. The fix can be found on the TCB page for this build.

Features
DWM - can be activated with the sbctl start command. Note that for VMware you need the 6.5.2 SVGA driver for DWM to work.

Outlook Express 7 - can be run normally, but it depends on WinFS.

WinFS - it is composed of some services, can be turned off via services.msc. It causes memory leaks.