Windows Longhorn build 4081

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6.0.4081.main.040503-1625
Build of Windows Longhorn
6.0.4081.main.040503-1625
OS family
Architecturex86
Compiled2004-05-03
Timebomb2004-10-30 (+180 days)
Works in
About
Longhorn4081Winver.png
SKUs
Professional
Key
TCP8W-T8PQJ-WWRRH-QH76C-99FBW
TCB.png

Windows Longhorn build 4081 is a Milestone 7 build of Windows Longhorn. On 23 January 2020, this build was listed in a BetaArchive thread by UX.Unleaked blog founder Grabberslasher. This build was released on 27 January 2020 in the fourth set of his 33 Longhorn/Vista builds along with build 5098.[1]

This build is the first componentized build of Longhorn, meaning many core features from previous builds have been removed. These features were scheduled to be added in subsequent versions of the operating system, leaving what remains the bare minimum to run the system. While more stable than the later componentized builds, installation takes significantly longer than previous builds.

Bugs[edit | edit source]

  • CD and DVD drives behave like local disks.
  • The Windows Classic theme will not function due to a broken Windows Classic.theme file.
  • On some computers and virtualizers, the WinPE doesn't support the mouse, so you must use the keyboard to navigate the WinPE.
  • Hardware and Devices folder does not open.
  • Sounds Control Panel applet is missing.
  • Task Scheduler from Control Panel shows a nameless folder and generic folder icon.
  • Phone and Modem Options Control Panel applet name is empty.
  • Although the Desktop Window Manager is present and can be activated by pressing Ctrl+Shift+F9 as in Windows Server 2008 build 4066, it will black screen due to a broken DirectX installation. It can fixed via the instructions listed on the Windows Aero page.
  • Safe mode is broken and displays a BSOD.
  • WordPad and Outlook Express won't start due to bugs.
  • Help and Support results in an explorer.exe reset.
  • Computer Management displays script errors.
  • Device Manager has a bug and as such, you cannot update drivers. You can install drivers by using devcon from the Windows XP DDK, and booting with the "Enable VGA Mode" option in the Advanced Options menu during startup.

Creating folders[edit | edit source]

The folder creation bug from build 4074 is still present in this build. You can apply a registry key by the following:

Windows Registry Editor Version 5.00

[HKEY_CLASSES_ROOT\.Folder]
@="Folder"

Gallery[edit | edit source]

References[edit | edit source]