Windows Longhorn build 4086 (Lab01_N)
|Build of Windows Longhorn|
|Timebomb||2004-12-31 (+180 days)|
Windows Longhorn build 4086 (Lab01_N) is a Milestone 7 build of Windows Longhorn. On 23 January 2020, this build was listed on a thread by UX.Unleaked blog founder Grabberslasher to be released to the BetaArchive FTP, and was later released in the tenth set of his 33 Longhorn/Vista builds on 2 February 2020 with its other compiles.
Changes[edit | edit source]
- This build reintroduces the new Windows Error Reporting dialog from build 4074 after being absent from previous componentized builds, although it is only displayed for Avalon-based programs (as a blank crash dialog) or when installing a driver (as a driver package installation error dialog).
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 as one of two outcomes may occur:
- 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).
- An error during the file copy phase.
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 does not function due to a broken
Explorer[edit | edit source]
- CD and DVD drives behave like local disks.
- Help and Support crashes Explorer.
- Explorer will crash after adding the display tile in sidebar and won't launch again. A workaround is to create a new account via cmd.
- When the Aero taskbar and sidebar are enabled, the Taskbar erroneously uses the Sidebar background.
Control Panel[edit | edit source]
- Hardware and Devices folder does not open.
- By default, the Phone and Modem Options Control Panel applet name is empty.
- Computer Management displays script errors due to missing registry entries.
Graphics[edit | edit source]
On some computers, you will need to enable VGA Mode after installing video drivers or the system will result in a blue screen of death with a error code
Driver installation[edit | edit source]
When you install a driver, a driver package installation error dialog may appear. Just click on
Cancel to continue the driver installation.
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 bugcheck with code
0x0000007B. This is because the
Safeboot key, located in
HKEY_LOCAL_MACHINE\SYSTEM\CurrentControlSet\Control is largely incomplete and missing a lot of entries. Restoring the key from an earlier build with working safe mode allows this build to boot properly, but the video driver will not initialize properly. As a result, the operating system will freeze as it transitions into graphical mode, so Safe Mode is currently not known to work on these pre-reset Longhorn componentized builds.