Universal Watermark Disabler is a freeware app which can remove all kinds of watermarks in Windows 10, Windows 8.1 and Windows 8. It works in any build starting from Windows 8 to the latest Windows 10 versions.
Supports any UI language.
Does not delete branding strings (i.e., does not modify system files!).
Removes any watermarks including BootSecure, Test Mode, Build string in the evaluation and pre-release builds, "Confidential" warning text and even the build hash.
All you need to do is run the file, click install, and your computer will log you out and back in. Be sure to save all your work first.
We last tested Universal Watermark Disabler on a Windows 10 evaluation build, and it did remove the most current nag, which is a red icon instead of a watermark.