[anonymfus]

> At first view, some may conclude that Ninjutsu OS amounts to a heavily modified yet pirated version of Windows 10. However, a video explaining how the software works suggests that users will actually need their own license for a genuine copy of Windows 10 to get the modifications up and running properly. Ninjutsu’s creator informs TF that’s indeed the case.

That is literally opposite of how it works. As Windows EULA does not give you rights to distribute derivative works, sharing practically any kind of modified Windows image is illegal, ever if you only change default desktop background image. But circumventing activation for yourself can actualy be legal in some specific scenarios.