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

Windows Longhorn build 4030 (with a build tag of 4030.Lab06_N.030630-1724) is a Milestone 6 build of Windows Longhorn. Prior to its leak, two images were shown by Grabberslasher on his UX.Unleaked blog. On 2020-01-23, this build was listed on a thread by the same user to be released to the BetaArchive FTP, and was later released in the ninth set of 33 other Longhorn builds on 2020-02-01.

This build is one of the earliest builds to feature "3D View", however it is unusable and doesn't draw icons properly. This build needs modification to enable Aero.