How to Remove Test Mode Watermark in Windows 7,8.1, 10
About Windows 10 Test Mode
The kernel-mode code signing policy requires that all Windows 10 drivers shall be digitally signed by Microsoft. But that’s not so practicable and pretty time-consuming. Therefore, Microsoft added the Test Mode to enable developers of drivers to test programs without having to provide an authentication certificate. Under the Windows 10 test mode, users can load and install unsigned drivers, and the Windows 10 test mode watermark will display.