Windows 8 build 7878

Windows 8 build 7878 is a build of Windows 8. Seven screenshots of this build were shared in a folder included with build 7746 on 3 May 2020. It was later shared on the BetaWiki Discord server on 4 June 2021.

New features and changes

 * The File History feature, originally known as History Vault, has been introduced in this build.
 * The modern setup client first introduced in build 7875 now includes a progress bar.
 * The Start Screen tiles are now colored, and the metro horizon has been removed.

Power options
If using VMware Workstation versions 15.x or above, attempting to restart or shut down in this build will cause a softlock.

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

Out-of-box experience
Attempting to select a network type will result in a driver unload bugcheck.

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

Personalization
Changing personalization options may occassionally crash File Explorer.

Language Bar
The new language bar is mostly broken in this build and only works on rare occasions.