Windows Longhorn build 4030 (Lab06 n.030630-1724)

Windows Longhorn build 4030 (Lab06_n.030630-1724) is a Milestone 6 build of Windows Longhorn. Prior to its public release, two images were shown by Grabberslasher on his UX.Unleaked blog. On 23 January 2020, this build was listed on a thread by the same user to be released to the BetaArchive FTP, and was later released in the tenth set of his 33 Longhorn/Vista builds on 2 February 2020.

Setup
Setup is identical to the previous build.

Upgrade
Upgrading to this build will cause  to throw out errors, and the system will become unbootable. This bug does not affect clean installation and it will boot up properly.

Desktop Compositing Engine
While the Desktop Compositing Engine works in this build, the Desktop Compositing Engine does not enable Direct3D shaders due to a bug. Because the DCE window frames rely on these shaders to function, it is not possible to enable them at this time.