Windows 8.1 build 9477 (fbl partner out21)

Windows 8.1 build 9477 (fbl_partner_out21) is a build of Windows 8.1. This build is an earlier compile of build 9477. It is known that this build exists only in the ARM architecture. One screenshot was found on the Chinese website BetaWorld. This build is currently only available to select BetaWorld members. As of 2021, it remains unleaked.