Windows 8 build 7891

6.2.7891.0.FBL_DNT2_DCON1.101129-1700
	Build of Windows 8
OS family	Windows NT
Version number	6.2
Build number	7891
Build revision	0
Architecture	x86
Build lab	FBL_DNT2_DCON1
Compiled on	2010-11-29
Expiration date
Timebomb	2011-07-01 (+214 days)
About dialog

Windows 8 build 7891 is a build of Windows 8, which was shared on 6 October 2024.

Editions and keys[edit | edit source]

Edition / SKU	Key
Starter	7Q28W-FT9PC-CMMYT-WHMY2-89M6G
Home Basic	YGFVB-QTFXQ-3H233-PTWTJ-YRYRV
Home Premium	RHPQ2-RMFJH-74XYM-BH4JX-XM76F
Professional	HYF8J-CVRMY-CM74G-RPHKF-PW487
Ultimate	D4F6K-QK3RD-TMVMJ-BBMRX-3MBMV

New features and changes[edit | edit source]

Setup[edit | edit source]

setupclient.exe has been updated and is now named setup.exe, replacing the legacy setup launcher. The legacy setup is still accessible by launching setup.exe in the sources folder.

Removal of Start button[edit | edit source]

Starting with this build, it is possible to remove the Start button from the taskbar. To accomplish this, a new DWORD value in HKEY_CURRENT_USER\Software\Microsoft\Windows\CurrentVersion\Explorer called YouBettaHideYoPearl is required to be made, with its value set to 1. After doing so, log off and log back in. If done correctly, the Start button should be removed.

System crash[edit | edit source]

The blue screen of death has been redesigned in this build, dropping the design seen in Windows XP in favor of a simplified black screen informing the user that their computer requires a restart, along with the bugcode (minus the parameters). This bugcheck screen utilizes the Segoe UI font, leveraging the VBE functionality that was implemented in earlier builds and the BGFX subsystem. However, in the event that the system crashes early in boot before BGFX is initialized, a fallback is used which merely dumps the bugcode parameters along with a short message prompting the user to hold down the power button.

Miscellaneous[edit | edit source]

A new user creation wizard has been introduced.

Redpill[edit | edit source]

Many changes have occurred since build 7880. Accents and backgrounds have been implemented, accessible using a registry key. The Start screen now has multiple views - while this is hinted at in 7880 by the existence of a "Move to Other View" option found while right-clicking on the Start screen tiles, it has not been implemented yet. This other view is an "Other Programs" view containing all installed programs. As a result of this, there are far less applications in the default Start screen view. This build contains some unique metro animations. Tile colors have been changed to be more uniform.

To replace the Metro downspace (removed, although not entirely so, in build 7878), a Desktop tile has been introduced. Clicking it brings the user back to the classic Windows desktop.

There have also been an immense amount of changes outside of the Start screen. An ImmersiveSettings app has been introduced, the ancestor of PC Settings, and several apps have been redesigned to fully use WinRT. Auto Colorization is no longer enabled by default on the Aero theme. ImmersiveBrowser, or IE Metro mode, has been implemented. The out-of-box experience had also received a major overhaul. The Modern Task Manager was updated to resemble its RTM counterpart. The Metro downspace has been dropped in favor of the snap function.

Start screen accent[edit | edit source]

To get the Start screen accent, open Registry Editor, head to HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\Windows\, create a new key called DWM, make a DWORD called EnableAccent and set its value to 1. Afterwards, log off and then log back on again, or restart explorer.exe.

As this build's implementation of the accent is largely incomplete, visual artifacts may appear across the screen.

Login[edit | edit source]

The login screen was updated to feature the same accents and backgrounds as seen in the start screen.

A lock screen has also been implemented as well and will appear regardless if the computer is set to require Ctrl+Alt+Del to be pressed to log on or not.

Removable media prompt[edit | edit source]

The removable media prompt has been revamped as well, using the new Metro design. It mostly consists of the same actions as the previous removable media prompt used in earlier builds of Windows 7.

Immersive apps[edit | edit source]

Immersive Browser: C:\Program Files\Microsoft\Immersive Browser\Microsoft.ImmersiveBrowser\miexplore.exe
Immersive Reader: C:\Windows\System32\glcnd.exe
Metro Control Panel: C:\Windows\System32\SystemSettings.exe
Webcam Application: C:\Windows\System32\webcam.exe

Bugs and quirks[edit | edit source]

General[edit | edit source]

The login sound plays three times upon logging in.
Removing a USB flash drive may result in a bugcheck.
The CD/DVD drive may open/eject upon shutting down or restarting when installed on real hardware.
When setting the pattern logon's pattern, it won't actually check if the reentered confirmation pattern is the same as the original pattern. When entered differently, the pattern will fail to apply even if the original pattern choice was matched.
Opening the Windows Media Center may result in a KERNEL_MODE_EXCEPTION_NOT_HANDLED bugcheck.

Setup[edit | edit source]

The last word of status messages shown when starting Setup and before the computer reboots into OOBE is cut off.

Shell[edit | edit source]

Enabling EnableAccent causes rendering issues.
The Start screen may be unresponsive for a minute after login.
The Desktop tile will show the Windows 7 default wallpaper after first logging in.
An option to "uninstall" the desktop from the Start screen is present but does not function.

Themes[edit | edit source]

The title bar and watermark uses the Arial font due to a typo in the aero.msstyles and aerolite.msstyles files.
Only the top portion of the window frame is blurred when using the Windows Aero theme, leaving the side borders transparent.
The Windows Basic and the High Contrast themes do not render properly due to the enforcement of the DWM Aero theme.