Windows Longhorn build 4011

Windows Longhorn build 4011 is a Milestone 4 build of Windows Longhorn, which was shared online on 21 July 2006. At this point, it is not much different from build 4008, although by this point, virtually all references to Windows XP have been removed.

The copyright date in the winver banner which was shown as 2006 in builds 4008 and 4005 was corrected in this build and now shows as 1985-2003.

Setup
Although setup itself is mostly similar to Windows Longhorn build 4008's, aside from the boot screen, you are not able to get past the product key section due to missing exports. If one was to get the product key section to work, all inputted characters when typing in the product key will be uppercase, alongside dashes being added after every 5 letters.

New features

 * The Windows XP boot screen has been replaced with a new Longhorn boot screen, removing the final few references to Windows XP. However, this build still contains the Windows Messenger, which throws .NET Passport notifications with the last XP reference, and the Windows XP Tour, which was removed in build 5048.
 * Parental Controls has gained a new icon.

the icon of the running application.
 * The Desktop Composition Engine now works again (after being broken in build 4008). However, it only provides transparency effects.
 * Notifications have been updated with a new look.
 * It is possible now to use the new Avalon taskbar/sidebar settings applicaton while having the new taskbar enabled.
 * The title bar in explorer has been slightly updated. Instead of using one color, it now features a gradient, alongside

Sidebar
The Sidebar has gained some major uplifts. New tiles have been added, including options (which serves the same purpose as right-clicking on the Sidebar). Other tiles (such as the Search tile) have been updated slightly, while a few others (such as the Windows Media Player tile) no longer require registry modifications to be available - most likely being updated as well.

Although the Windows Media Player tile no longer crashes upon adding a soundtrack, you cannot play any soundtracks, due to the buttons having little to no functionality. The Longhorn Status tile still isn't available by default, but you can enable it with the following code:

Windows Registry Editor Version 5.00 [HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\Windows\CurrentVersion\Explorer\StartBar\Modules\Longhorn Status] "AssemblyName"="ShellInterop" "Friendly Name"="Longhorn Status" "Type"="System.Windows.Desktop.SharePointTile"

NFO
Build 4011 was leaked with the following NFO. NFO contents 

Bugs and quirks

 * Many drivers aren't installed by default during the hardware portion of setup and have to be installed manually.
 * Icons that are selected by the mouse or keyboard become more pixelated.
 * Windows Storage Engine often crashes on startup.
 * The OOBE is broken and closes after the first page.
 * Task Manager stops responding for a few seconds upon starting a new task, and also doesn't open upon pressing Ctrl + Alt + Del.

Installation
There have been several different disc images for this build available online over the years. The copy of this build that is widely available has a corrupt, and as such, will not install properly under any circumstance. The copy currently on BetaArchive's FTP server can install properly, but has assert errors when attempting to clean install due to the WinPE being partially corrupted. And attempting to launch command prompt via Shift+F10 will also trigger a bugcheck with error code  instead.