Windows 10 build 9780

Windows 10 build 9780 is a pre-Technical Preview build of Windows 10. This build was leaked on 2019-01-26. This build is currently the earliest leaked build of Windows 10, and due to its earliness it is identified as Windows 8.1 in many areas and still has kernel version 6.3. Because it is in the fbl_partner_eeap branch, the timebomb is broken and the build can be booted on the current date. Despite it having a start menu, native support for Windows Store apps in windowed mode has not been introduced yet.