Windows 10 build 9900

Windows 10 build 9900 is a build of Windows 10. This build includes major updates to the interface, including changing the taskbar to the black color used in the RTM and additionally, removed the transparency effect. This is also the first leaked build to include Cortana. It is also the first leaked build compiled in the "fbl_awesome1501" lab.

Taskbar
The taskbar design has been changed to a flatter style.

Search in the taskbar
Taskbar search has been improved with the addition of a text box and Cortana voice assistant.

Security and maintenance
The Security and Maintenance icon on the taskbar has been removed.

Windowed Metro
The design of the window subway was changed to a more modern style.

PC Settings and the Control Panel
The home page in PC settings has been changed and the Update Center page in the control panel has been removed.

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

Window thumbnail color error
Window thumbnails on the taskbar do not change color, but the user can change it after the computer restarts.