Microsoft has started pushing out a new preview build of Windows 10 (build 18317) to Windows Insiders who are subscribed to the Fast ring, and with it comes a pretty big change. The latest preview build separates Search and Cortana in the taskbar so they can be developed independently.

“Some Insiders have had this update for a few weeks

Source: Hot Hardware – Microsoft’s Windows 10 Preview Build Decouples Cortana And Search Functions