On this page you will find a list of most known builds of Longhorn. Builds are sorted by their build date in ascending order. To view more detailed information for a given build, simply click ‘Read more’. About some builds on this page not much more is known than their respective build tags. For a couple of them, not even a single screenshot is available. I included these builds in the listing anyway for the sake of completeness.

 

 Please note that you won’t find any direct downloads to Longhorn builds on Experience Longhorn. If you’re interested in giving Windows “Longhorn” a test run please check out WinWorld for downloads.

 

Archive contains 55 builds



6.0.3663.0.Lab06_N.020728-1728

28-07-2002

Private Leak

This is the very first build of Longhorn of which screenshots exist. This build still looks a lot like Windows XP / Server 2003 as it is an extremely early buil... Read more →

6.0.3670.0.Lab06_N.020819-1749

19-08-2002

Private Leak

This build is not much newer than 3663 and still not much of the UI had been changed at this time. One of the screenshots shows the all new device manager that ... Read more →

6.0.3683.0.Lab06_N.020923-1821

23-09-2002

Public Leak

Build 3683 was the first Codename “Longhorn” build to leak publicly on the internet when it leaked on 20th October 2002 as an x86 Professional compile by th... Read more →

6.0.3706.0.Lab06_N.021029-1731

29-10-2002

Public Leak

Build 3706 was leaked on 22nd May 2006 as an x86 Professional compile. It is one of only a few builds that are confirmed to contain a working start page. The ... Read more →

6.0.3708.0.Lab06_N.021108-1847

08-11-2002

Private Leak

There really isn't any important information about this build other than that it still uses the older wallpaper as found in build 3683.

6.0.3713.0.Lab06_N.021113-1841

13-11-2002

Public Leak

This build has been leaked on BetaArchive as an x86 Professional compile. This is the first leaked build to feature a new taskbar that really functione... Read more →

6.0.3718.0.Lab06_N.021119-1730

19-11-2002

Public Leak

Longhorn build 3718 was leaked as an x86 Professional compile on April 30, 2004. The build features a Desktop Composition Engine, much more workable than the... Read more →
3750

6.0.3750.0.private/lab06_dev_ux(thomasj).021128-1402

28-11-2002

Private Leak

Supposedly, one of the last builds compiled in the 3000-range. The build tag suggests this build was privately compiled by developer Thomas J.

6.0.4001.0.main.021204-1515

04-12-2002

Public Leak

Windows Longhorn build 4001 is the first Milestone 4 build. This milestone represented the migration to a Windows Image-based install. This build has leaked as ... Read more →

6.0.4005.0.main.030128-1920

28-01-2003

Private Leak

Much like 4002, though this build uses the Image-based installation again. DCE is also available in this build. This build has a very prominent place holder for... Read more →
4007

6.0.4007.0.main.030212-2037

12-02-2003

Documentation

Version number on a leaked Windows Imaging Utility file (xImage.exe)

6.0.4008.0.main.030219-1933

19-02-2003

Public Leak

Build 4008 is the first leaked Milestone 4 build, bringing with it a number of public firsts, such as the WIM imaging format. It does however, suffer a number o... Read more →

6.0.4015.0.main.030328-1500

28-03-2003

Public Leak

Leaked by WiNBeta on the 28th April 2003. This is the first Milestone 5 build

6.0.4029.0.main.030619-0000

19-06-2003

Public Leak

6.0.4030.0.Lab06_n.030630-1724

30-06-2003

Private Leak

6.0.4028.0.Lab01_N.030701-2000

01-07-2003

Public Leak

Only leaked as Enterprise Server SKU
4030-02

6.0.4030.0.Lab06_n.030702-1727

02-07-2003

Private Leak

Second known 4030 compile, built three days after the first known 4030 build from Lab06.
4032

6.0.4032.0.Lab06_n.030710-1709

10-07-2003

Private Leak

6.0.4033.0.main.030717-1555

17-07-2003

Public Leak

The publicly available image (leaked 23 May 2006) of this build has had its pidgen.dll replaced. This means that the orignal product key as... Read more →
4038

6.0.4038.0.main.030813-1852

13-08-2003

Private Leak

6.0.4039.0.Lab06_n.030827-1717

27-08-2003

Public Leak

This build leaked at 22 August 2007 and was the first leaked image to use a system in which the complete setup is contained inside the install.wim file. This... Read more →

6.0.4042.0.Lab06_N.030909-1709

09-09-2003

Public Leak

This build's setup introduces a clock timer and the well known step indicators (1,2,3) that are still present in Windows setup today. The build itself showcases... Read more →

6.0.4044.0.Lab06_n.030915-1925

15-09-2003

PDC 2003

One screenshot of this particular build was shown at PDC 2003 during the Avalon Graphics and Media (Part 2): Using Graphics, Animation and Composition in Y... Read more →

6.0.4050.0.idx02.030928-0552

28-09-2003

Documentation

This build string appears on a large amount of files included in the Longhorn SDK (LDK) which was released at PDC 2003.

6.0.4051.0.idx02.031001-1340

01-10-2003

PDC 2003

This build was given out to attendees of the Professional Developers Conference (PDC) 2003 and is the very first version of Longhorn to be released ... Read more →

6.0.4053.0.main.031022-1720

22-10-2003

Public Leak

This build leaked 1 March 2004.
4059

6.0.4059.0.main.031208-1842

08-12-2003

Documentation

Version number on a leaked Windows Imaging Utility file (xImage.exe)

6.0.4066.0.main.040226-1010

26-02-2004

Public Leak

The copy of this build leaked 20 December 2008 installs using the old i386 installation method. This build includes multiple features earlier seen in builds c... Read more →

6.0.4074.0.idx02.040425-1535

25-04-2004

WinHEC 2004

This is the best known Longhorn build, it is generally known as the 'WinHEC 2004' build as it was given out there. It is from the Milestone 7 stage, still featu... Read more →

6.0.4083.0.main.040516-1537

16-05-2004

Public Leak

The 64-bit builds of Longhorn are already notorious for their emptiness, but this build is especially empty. Due to the componentising effort this build is lite... Read more →

6.0.4084.0.main.040527-0915

27-05-2004

Public Leak

Very empty build, most interesting features had been removed by this time to implement them again one by one over time. WinFS has been cut in this build. None ... Read more →

6.0.4088.0.Lab02_N.040706-1655

06-07-2004

Public Leak

Leaked 13 January 2015, this is the most recent public Longhorn leak. Although similar to neighbouring builds, it show some minor changes. Before this time only... Read more →
4089-snap

6.0.4089.0.private/Snap_dev_ux(ntvbl06).040724-0614

24-07-2004

Documentation

5000

6.0.5000.0.vbl_core.040803-2000

03-08-2004

Private Leak

This build is among the earliest post-reset builds, if one can name it that. This build was build even before Longhorn was properly reset. A range of builds carrying build number 5000 exist. Main goal of this series of builds was to componentize the Server 2003 SP1 RC source before any further development would begin.

6.0.4093.0.main.040819-1215

19-08-2004

Public Leak

Often labelled as the most unstable pre-reset build this build is actually surprisingly usable and even features like WinFS are present and working. This build... Read more →

6.0.5001.0.winmain.040927-1610

27-09-2004

Private Leak

First known proper Longhorn build by the main branch after the reset. This build includes updated branding including a Longhorn photo shopped on Win... Read more →
5002

6.0.5002.0.winmain.041013-xxxx

13-10-2004

Documentation

Referenced in a document regarding the status of Longhorn CBB builds.
5003

6.0.5003.0.winmain.041015-xxxx

15-10-2004

Documentation

At this moment winmain was taking in Server 2003 SP1 bug fixes from the dnsrv_winmain branch to keep the source up to date.

6.0.5019.0.winmain.04xxxx-xxxx

2004

Documentation

This build is referenced multiple times in 5048's Setup Loader for Migration (upgloader.dll) as a minimum requirement to complete an upgrade from one CBB (comp... Read more →

6.0.5048.0.winmain_idx02.050401-0536

01-04-2005

WinHEC 2005

6.0.5054.0.vbl_ux_nisd.050404-1730

04-04-2005

WinHEC 2005