Windows 10 build 9907 (fbl ie)

Windows 10 build 9907 (fbl_ie) is a build of Windows 10. It is notable for being available as a psuedo-localized build, which was used for localizability testing during the core development of Windows.

Timebomb
This build is a test-signed build (not flight-signed), and as a result can be installed on the current date.

Installation
This build can only be installed on machines utilizing UEFI firmware since it hangs on a BIOS system.

Window thumbnail border color
If window auto-colorization is enabled, the window thumbnail borders on the taskbar do not change color even after the wallpaper changes. This issue can be remedied by manually changing the window color through the Control Panel.