Windows 8.1 build 9415 (fbl partner out22)

Windows 8.1 build 9415 (fbl partner out22) is a build of Windows 8.1. Screenshots of this build in Simplified Chinese were leaked in a BetaArchive topic on June 1, 2013, while the build itself was leaked on February 4, 2020 in the Korean language. An English (US) language pack for this build was leaked on the same day as the build itself. This build brought back the Start button, however, unlike build 9431, it's still invisible and requires a mouse-over in the bottom left corner to get it to appear.

OOBE
This build has a broken OOBE and you may have to make an account manually and skip OOBE by making changes in the registry.