How to Remove Test Mode Watermark in Windows 10?

1) Click Start, and then type cmd in the Search box.Under Programs, right-click cmd.exe, 

2)  click Run as administrator.At the command prompt, type the following text, and then   

   press Enter: bcdedit /set TESTSIGNING OFF.

command to remove Test Mode Water Mark

3) Close the Command Prompt window, and then restart your computer.