Windows Longhorn build 4084

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Build of Windows Longhorn
OS family
Timebomb2004-11-23 (+180 days)
Works in
Preinstallation Environment
TCB.png TCBGallery.png

Windows Longhorn build 4084 is a Milestone 7 build of Windows Longhorn. Prior to its leak, only the Preinstallation Environment of this build was available. The full build was leaked to BetaArchive on 16 October 2011.[1]

Microsoft realized that in its current form, Longhorn was not feasible, so many features were removed and were scheduled to be added in subsequent versions of the operating system. This build, along with other builds bearing the 408x branch, are a result of that decision. This build is mostly componented and only includes a few features, running at the bare minimum working configuration.

Fixes[edit | edit source]

  • The Sounds control panel applet is now present again.
  • Device Manager is able to install or update drivers again, (unlike builds from 4081 to 4083).

Bugs and quirks[edit | edit source]

Installation[edit | edit source]

  • As typical of builds in this build range, it tends to take a long time to install and can be unstable.
  • Partition and format a drive from a previous or later build prior to starting installation.

No mouse driver in WinPE[edit | edit source]

On some computers and virtualizers, the WinPE doesn't support the mouse, so you must use the keyboard to navigate the WinPE. This seems to be related to using a PS/2 mouse, as USB mice seems to work fine for the setup.

Upgrade[edit | edit source]

Attempting to upgrade from other builds is not possible, causing either of these 2 things:

  1. A bugcheck with error code 0x7E after the second reboot. This is commonly observed when trying to upgrade from non-componentized builds, such as 4074 (via a registry tweak that reports it as a componentized build).
  2. An error while copying files.

WordPad[edit | edit source]

WordPad does not start, as it will display with Failed to create empty document instead.

Outlook Express[edit | edit source]

Outlook Express does not start due to registry errors and certain dependencies on WinFS.

Themes[edit | edit source]

  • The Windows Classic theme will not function due to a broken Windows Classic.theme file.

Explorer[edit | edit source]

  • CD and DVD drives behave like local disks.
  • Help and Support crashes Explorer.
  • Explorer can randomly crash for no reason under normal use, such as adding Sidebar tiles, but this depends on the hardware being used.

Control Panel[edit | edit source]

  • Hardware and Devices folder does not open.
  • Task Scheduler from Control Panel shows a nameless folder and generic folder icon.
  • Phone and Modem Options Control Panel applet name is empty.
  • Computer Management displays script errors due to missing registry entries.

Graphics[edit | edit source]

Enable VGA Mode after installing video drivers or the system will result in a blue screen of death with a error code 0x000000B4.

Windows Product Activation[edit | edit source]

Windows Product Activation is missing.

Safe mode[edit | edit source]

The safe mode is completely broken and results in a blue screen of death.

Gallery[edit | edit source]

References[edit | edit source]