Windows Longhorn build 4008

Windows Longhorn build 4008 is a Milestone 4 build of Windows Longhorn. This build was leaked on 2003-02-28.

New features

 * This build also had many updates made in the folder windows. For example, the My Documents details background color has changed from blue to tan.

Parental Controls
This is the first build to include Parental Controls, which can be used to limit the hours that can be used on the computer and monitor the use of internet programs. Only limiting hours that a user can use the computer has been implemented.

The Administrator account can set a limit to any limited user account, including the Guest account. When it is set, the limited user account with the restriction can only use the computer for the specified times the Administrator set. When the time the person can use the computer is past, it automatically performs a "Switch User" operation. Any attempt to log in at a disallowed time will result in a "wrong password" message if the user had a password, regardless of whether the user entered the correct password or not. If that user doesn't have a password, then it will place a password on that account until the user is allowed to log in again.

Hidden Sidebar tiles
A few Sidebar tiles are disabled by default in this build. These are: A registry patch was made available by AlphaAddict that enabled the aforementioned tiles in 2006, but the download link no longer works. There is no known other way to make them visible.
 * RMA Test Tile - Just the "Longhorn" clock png stretched in the tile
 * Longhorn Status - Links to an intranet link at Microsoft
 * Internet Webcam - Links to a live image of a Redmond, WA freeway, similar to the Traffic ticket from Sideshow, a prototype of Sidebar from Microsoft Research
 * Media Player - Non-functional
 * Messenger Status Tile - This tile only works if you are using Windows Messenger. You cannot use MSN Messenger with this tile. Also, this tile does not work with Windows Messenger 4.0, you will need 4.6 or 4.7 for it to function correctly. In order to activate this tile, do the following:
 * Navigate to
 * Create a new registry key called
 * In the new key, create the following string values and set the values to what is to the right of the equals sign.

Bugs and quirks

 * Unpartitioned drives cannot be selected for installation in the setup. To setup from a hard drive without any partitions, select the disk that Windows will be installed on.
 * The Desktop Composition Engine is heavily broken in this build, so the animations and window transparency cannot be enabled.
 * On older CPUs, the OOBE can error out upon loading. To get past this, press Ctrl-Alt-Delete to load Task Manager and kill the process.