Windows Longhorn build 4029 (Lab06 n)

Windows Longhorn build 4029 (Lab06_n) is one of the first Milestone 6 builds 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, featuring a design that is nearly identical to the animated BAML version found in build 4066 onwards.
 * 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 will no longer show if the sidebar is present.
 * Windows Messenger has been updated to version 6.0.
 * Many applets (such as My Computer and the Sync Manager) have gained new icons.
 * The Windows Explorer interface received a minor design update, which introduces a dedicated theme resource for the navigation bar and removes the throbber from the main window.
 * Although MyTVApp still exists, it no longer displays anything rather than the side panel.
 * A shortcut pointing to an internal bug reporting webpage has been added to the desktop.

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 DCE window frames rely on these shaders to function, it is not possible to enable them at this time.