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. However, upgrade setup is buggy, and once completed, lsass.exe will error out - causing the build to restart.

Desktop Composition Engine
While the Desktop Composition Engine works in this build, the Desktop Composition Engine does not enable Direct3D shaders due to a bug. Because the Aero Glass borders rely on these shaders to function, it is not possible to enable the borders at this time.