: Entering a genuine 25-digit product key is the only official way to permanently remove the watermark and unlock all customization features. Registry Editor Workaround
If your goal is to remove "long" or unnecessary built-in features (often called bloatware) to improve performance: Removewat Windows 10 Pro
"RemoveWAT" (Remove Windows Activation Technologies) was a popular tool originally designed for Windows 7 to bypass activation and remove the "non-genuine" watermark : Entering a genuine 25-digit product key is
: This method can hide the watermark temporarily, though it does activate Windows. Registry Editor and run as administrator). Navigate to: Navigate to:
. While some users still search for it for Windows 10 Pro, modern versions of Windows handle activation differently, making this specific legacy tool largely obsolete and often flagged as a security risk. Removing the Activation Watermark
: If your watermark specifically says "Test Mode," you can disable it using the Command Prompt (Admin). bcdedit -set TESTSIGNING OFF and press Enter. Removing Windows 10 Features