Windows Longhorn build 4029 (Lab06 n)

Windows Longhorn build 4029 (Lab06_n) is a Milestone 6 build of Windows Longhorn. On 23 January 2020, this build was listed on a thread by Grabberslasher, founder of the UX.Unleaked blog, to be released to the BetaArchive FTP, and was released as the first two builds of his 33 Longhorn/Vista builds on 24 January 2020, alongside build 4017.

Setup
Although setup overall is similar to previous builds of Windows Longhorn, the fonts that are used during setup now use ClearType.

New features and changes

 * This build includes a new red aurora wallpaper. The "longhorn milestone 5" text has also been replaced with "LONGHORN M6".
 * The Aero Wizards debuted in this build. The CD Writing Wizard is one of these Aero Wizards, which allows users to burn ISO images to an optical disc.
 * 3D icons are included within the Games Center (which would later be renamed to "Games Explorer").
 * The taskbar clock that was present in builds 4015 to 4029 has been removed in favor of the sidebar clock.
 * Windows Messenger has been updated to version 6.0.
 * Many applets (such as My Computer and the Sync Manager) have gained new icons.
 * The Explorer interface has been refined. Notably the "Windows flag" throbber has been removed and the navigation bar now has a dedicated theme resource.
 * Although MyTVApp still exists, it no longer displays anything rather than the side panel.
 * The desktop contains a new icon, File a Longhorn bug, which leads to an internal webpage.

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.