Windows 8 build 7978

Windows 8 build 7978 is a build of Windows 8. This build was leaked to the BetaWiki Discord on 9 May 2021 in the form of an encrypted .7z file. It is the last build to feature the boot screen used in Windows 7.

Bugs

 * This build must be installed on either an IDE or SATA hard drive since SCSI disk devices are not functional on this build.
 * On some devices, opening either Windows Photo Viewer or Internet Explorer results in an  bugcheck. This can usually be fixed by using the Windows Basic theme.
 * Some graphics drivers may cause only the window borders to render, as well as causing the screen to flicker whenever the mouse is moved.

Aero
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.