2Remove notification about activation by third-party programs.1How to remove the inscription about activation through the registry.2How to remove the inscription about the activation of Windows 10.1Why does a watermark appear with Windows 10 activation.After the initial installation of the Windows 10 operating system from removable media, you must activate it to confirm the licensing rights to own this version. This is required to prevent the use of pirated content and to reconcile the product license key with valid Microsoft keys. Before the key is introduced, the system will operate in trial mode for thirty days, after which it will stop starting. Within the specified time period, the user is obliged to activate or uninstall the system. Windows 10 will automatically remind you to activate every time it starts up by displaying a watermark with a reminder text in the lower right corner of the display. This sometimes annoys many users, because of which they start looking for ways to remove the automatically pop-up inscription.