At least for consumers, you can install Windows 10, never give it a license key,...

FreakyT on Oct 26, 2020 | parent | context | favorite | on: ReactOS (Free and Open Source Windows): Jérôme Gar...

At least for consumers, you can install Windows 10, never give it a license key, and it will run forever with almost no restrictions. (IIRC you're blocked from changing your wallpaper, there's an occasional nag prompt, but that's it.)