Windows Longhorn build 4040

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6.0.4040.Lab04_N.030828-1910
Build of Windows Longhorn
6.0.4040.Lab04_N.030828-1910
OS family
Architecturex86
Compiled2003-08-28
Timebomb2004-02-24 (+180 days)
Works in
About
WindowsLonghorn-6.0.4040-About.png
SKUs
Professional
Key
TCP8W-T8PQJ-WWRRH-QH76C-99FBW
TCB.png

Windows Longhorn build 4040 is a Milestone 6 build of Windows Longhorn and is one of the last builds for that milestone. Grabberslasher first gave the details of this build on his UX.Unleaked blog. On 2020-01-23, this build was listed on a BetaArchive thread by the aforementioned user to be released to its FTP, and was released on 2020-01-31, alongside build 4002 and build 5356. This build is one of the last builds to include the Plex theme, together with the main compile of 4042.

Overall, this build has a very similar feature set to builds 4038 and 4039.

Setup[edit | edit source]

Although setup altogether is mostly similar to previous builds of Longhorn, the numeral and clock sprites now no longer contain a transparent background.

Features[edit | edit source]

  • Much of the interface remains similar to that of build 4038 due to Lab04's use of older code, likely from the main lab builds. This can be seen in areas such as File Explorer, where the back, forward and favorite icons are identical to build 4038.
  • Related to Lab04's use of older code, the service winux whilst using the net stop command is not available, leaving you the only choice of logging in and out if renaming Plex to Aero and then enabling DCE.

Bugs[edit | edit source]

Installation[edit | edit source]

Some copies of this build's installation media cannot be booted normally due to a call to a non-existent index in the INSTALL.WIM by SETUPLDR.BIN. To install this build in this case, either upgrade from a previous build or use a WinPE from a previous build.

Gallery[edit | edit source]

UX.Unleaked images[edit | edit source]