Windows Longhorn build 4042 (Lab06 n)

Windows Longhorn build 4042 (Lab06_n) is one of the first Milestone 7 Windows "Longhorn" builds. It was first described by Grabberslasher in his UX.Unleaked blog on 2008-07-07. It eventually leaked to BetaArchive on 2011-04-25.

This build hides an interesting surprise; while the setup is identical to build 4039, the desktop now contains a new theme named Slate, which seems to be the forerunner to Windows Vista's Windows Aero theme. It features a gray theming (as opposed to Plex's blue; Plex was never intended as a complete theme, but rather as a placeholder) and a background reminiscent of the one from builds 3663 to 3708.

New features and changes

 * The boot screen/safe to shutdown screen has been updated and now uses the older, colored Windows logo used in Windows XP and Windows Server 2003. The white Windows logo is still used in the Start button when the Windows Sidebar is disabled, and on the winver and "About Program" dialogs.
 * The Pig Latin version name has been changed to "Longhorn Professional".
 * This build marks the debut of the new Slate theme, which was first seen publicly in the various 4050 builds during the PDC 2003, and the official PDC build, build 4051. Alongside, many parts of the interface has been heavily revamped for a cleaner UI.
 * The login screen has been modified to fit the Slate theme, with a gray-bluish background.
 * This build also includes the Aero Glass borders that was present in build 4039. It is activated in the same way as build 4039.
 * In the Start Menu, some folder locations have had the 'My' dropped from their names, although not all; the 'My Documents' folder goes to the traditional shell location, whereas the 'Documents' folder goes to the library system similar to that found in Windows 7.
 * This is the first leaked build to contain the Online Photo Print wizard.
 * The "3D View" option in Explorer (and thus the Panorama and Carousel view styles) are no longer accessible. Many sidebar tiles present in Milestone 3-6 builds have also been removed.
 * This build contains a new app called "StickyNotes". This application is hidden at the  folder. Unlike in build 4074, Stickies work by simply dragging an empty text file onto the StickyNote icon.