Windows 8 build 7973 (fbl core2 sid data)

Windows 8 build 7973 (fbl_core2_sid_data) is a build of Windows 8, which was uploaded to BetaArchive on 19 September 2015 only as an x64 checked/debug version.

Changes

 * There are massive updates to the Metro OOBE:
 * The flower background has been replaced by a single color with a spotlight in the middle.
 * "Express settings" debuted as "Recommended settings".
 * Options and buttons have been uplifted to better fit with the Metro design.
 * This marks the first time where the new loading spinner is used. It can be seen at the end of the OOBE.

Redpill
A tool named Redlock can be used to unlock all of the 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.