-set Testsigning Off Better: Bcdedit

To remove the watermark and return your system to its standard, secure state, follow these steps provided by Dell Support and other technical resources: :

Windows enters "Test Mode" when the testsigning option is set to ON . This mode allows the system to load and run drivers that have not been digitally signed by Microsoft—a common necessity for developers testing new hardware or users utilizing specialized, uncertified legacy drivers. bcdedit -set testsigning off

bcdedit -set testsigning off

Look for the testsigning option in the output. If it's set to off , then test signing mode is disabled. To remove the watermark and return your system