Windows 10 build 15019 (rs prerelease.170122-1331)

Windows 10 build 15019.1001 is a recompiled version of build 15019.1000. It was showcased in the video "Game Mode, Forza Horizon 3 Hot Wheels Extension, and more" for the series "This Week On Windows" on Channel 9. The build itself remains unleaked as of today.