Windows 8 build 7973 (fbl core2 sid data)

Windows 8 build 7973 (fbl core2 sid data) is a Milestone 3 build of Windows 8. This build was only leaked as an x64 checked/debug version. It bears little difference to the previous build. It was leaked on 2015-09-19 by OSBetaArchive. Unlike the fbl_core1_kernel_npc compile, this build still uses the Windows 7 boot screen.

Redpill
A version of Redlock was released on 2020-01-29, unlocking all redpill levels on this build, including the start screen.

The Metro in this build is identical to its alternate compiles. However, MS Help has been removed.

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.