Windows 8 build 7878

6.2.7878.winmain.101104-1752
Build of Windows 8
6.2.7878.winmain.101104-1752
OS family
Architecturex64
Compiled2010-11-04
Timebomb2011-07-01 (+239 days)
Works in
About
7878-winver.png
TCB.png

Windows 8 build 7878 is a build of Windows 8. Seven screenshots of this build were included with the original upload of build 7746. It was later shared on the BetaWiki Discord server on 4 June 2021.

Editions and keys[edit | edit source]

Edition / SKU Name Key
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]

  • The File History feature, originally known as History Vault, has been introduced in this build.
  • The modern setup client first introduced in build 7814 now includes a progress bar.

Redpill[edit | edit source]

Immersive features[edit | edit source]

  • The Start screen tiles are now colored, and the Metro Horizon has been removed, although its resources are still present in twinui.dll.
  • Right-clicking on a tile now shows a menu with several options.
  • Pattern logon is available if you set EnablePatternLogonForInternalTesting in HKEY_LOCAL_MACHINE\Software\Microsoft\Windows\CurrentVersion to 1, however there's no option to use it on the login screen.
  • A new OOBE has been introduced.
  • A new AutoPlay dialog has been added, which is just the exact same as Windows 7 but longer.

Bugs[edit | edit source]

Installation[edit | edit source]

The messages shown when the Setup is starting or restarting the computer are cut off.

Out-of-box experience[edit | edit source]

Attempting to select a network type will result in a driver unload bugcheck. To work around this issue, remove or disable any network adapters before booting into OOBE.

General[edit | edit source]

  • If using VMware Workstation versions 15.x or above, attempting to restart or shutdown in this build will cause a softlock. To fix this, use the Power menu from the VM section.
  • Certain visual elements in select MMC snap-ins (such as Services) may use the Wingdings font.
  • An unassigned file association error may occur if certain options in the Start tile drop-down menu are selected.

Arial[edit | edit source]

This build uses the Arial font for the title bar and watermark because of a typo in the aero.msstyles and aerolite.msstyles files.

Aero[edit | edit source]

This build appears to have a slightly broken Windows Aero theme, with only the top portion of the window frame using the blur effect, leaving the side borders transparent.

Personalization[edit | edit source]

Changing personalization options may occasionally crash File Explorer. This is caused by InputSwitch.dll and can be fixed by replacing the file with a copy from build 7875.

Language Bar[edit | edit source]

The new language bar is mostly broken in this build and only works on rare occasions. It may occasionally spawn an empty, non-functional button between the notification area and the current date/time.

Desktop Window Manager[edit | edit source]

The Windows Basic and the High Contrast themes do not properly render due to the enforcement of the DWM Aero theme.

Gallery[edit | edit source]

Setup[edit | edit source]

Interface[edit | edit source]

Images prior to being publicly shared[edit | edit source]