Because it modifies the running memory of explorer.exe , some antivirus programs may flag it as a "False Positive".
Download the program (often in a .zip file) and extract the contents to a folder. Download Universal Watermark Disabler zip
The tool does not delete branding strings or modify core system files; instead, it uses COM-hijacking and DLL-proxying techniques to hide the text. Because it modifies the running memory of explorer
Effectively hides "Test Mode," "BootSecure," "Confidential," and pre-release evaluation strings. " and pre-release evaluation strings.