To distinguish the free version from the paid version, microsoft has added a watermark in the free version of windows in the bottom right of the screen saying “go to settings to activate windows” where you have to purchase the paid version of windows and then go to setting to activate windows in order to remove the watermark.
To simply tell you, Microsoft has both paid version and a free version of its operating system, you can do most of your work with the free version of windows, but paid version of windows gives you more power to personalize your computer as per your wants. Why does it say activate windows go to settings to activate windows