Undercover mode - is a look alike of the Windows environment in Kali Linux. Open the startup menu -> )

KALI-Undercover.jpg

If you want to disable Kali undercover mode (this will work with any version) you can:
- simply open your terminal by hitting > Ctrl+Alt+T and then type ?Kali-undercover? or ?undercover? and then hit enter.
OR
- you can go to Start Menu ->Applications -> Find -> Kali-undercover and the open that result or hit enter.
KALI-Undercover-disable.jpg