Windows 10 build 9909

Windows 10 build 9909 is a build of Windows 10. It was one of the first builds to test the new XAML Start menu design. It was also the last build to feature the centered title bar text introduced in Windows 8.

UEFI BIOS
This build has to be installed on an UEFI BIOS, otherwise it will hang booting setup.

Window thumbnail color error
This may be the last build in which the thumbnails of windows on the taskbar do not change color, but the user can change it after restarting the computer or restarting Explorer.