Microsoft's End User License Agreement (EULA) prohibits the unauthorized modification and distribution of its software. Using these builds often constitutes a form of software piracy. 4. Safer Alternatives

Use trusted open-source scripts (e.g., Chris Titus Tech’s Windows Utility) on an official Windows 11 Pro install.

Custom Windows ISOs are unofficial versions of the operating system where a third-party developer has pre-applied modifications to the standard Microsoft Windows 11 installation media.

If a custom OS is necessary, projects with long-standing community reputations like AtlasOS or Tiny11 are generally considered lower risk, though still not as secure as the official release.

Users can significantly enhance privacy by using a local account instead of a Microsoft account and manually adjusting settings in the Privacy & Security menu.