But for others, knowing how to activate Windows 11 without a product key is a must to customize various things on their PC like changing wallpaper, themes, etc. If you have an original copy of Windows 10 and you just upgrade it with the latest developer build of Windows 11, you can easily customize the settings on your system. We’ll also give some quick workarounds to remove the ‘activate windows’ watermark on your screen. This guide will show you exactly how to activate Windows 11 permanently for free. By now, you might have installed the latest Microsoft Windows 11 on your PC and thinking about how to activate it.