Windows Longhorn build 4002

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6.0.4002.Lab06_N(ntvbl06).030108-1926
Build of Windows Longhorn
6.0.4002.Lab06_N(ntvbl06).030108-1926
OS family
Architecturex86
Compiled2003-01-08
Timebomb2004-01-06 (+363 days)
Works in
About
4002-winver.png
SKUs
Professional
Key
CKY24-Q8QRH-X3KMR-C6BCY-T847Y
TCB.png TCBGallery.png

Windows Longhorn build 4002 is a Milestone 4 build of the Microsoft Windows Longhorn operating system. This build makes use of the Desktop Composition Engine seen in earlier Milestone 3 builds.

Unlike later Milestone 4 builds, build 4002 uses the old i386-based setup routine instead of the newer one based on the WIM installation format. It is the first Milestone 4 build to use the new background unlike build 4001, which still uses the old M3 background.

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 4040 and build 5356.[1] WinUnleaked also had images of this build.

Bugs[edit | edit source]

Installation[edit | edit source]

This build cannot be installed via a CD boot because it attempts to incorrectly load the coverage.dll file. As a result, the system will BSOD after formatting the drive due to loading this file. setup.exe also attempts to load this file and quits due to it, but running winnt32.exe can allow setup to load.

During GUI setup, there will be a copy error that it fails to copy WinFSSyn.sql, WinFSSyC.sql, and WinFSSyM.sql, the user can safely skip copying these files.

Gallery[edit | edit source]

WinUnleaked images[edit | edit source]

References[edit | edit source]