Just in case this can help someone. My Mini S12 Pro came pre-loaded with Windows 11 Pro 2 years ago. I currently have Windows 11, version 24H2 installed. A few weeks ago I started seeing a watermark on every screen that read “Activate Windows”. I just discovered how easy it is to Activate pre-installed Windows. Go to Settings, System and scroll down to Activation. If the first entry says “Not activated” simply click on the Troubleshoot dropdown right below that, click the appropriate answer and your Win 11 should instantly ACTIVATE! Watermark disappeared. How easy is that?