If you are looking to activate your windows 10, you have two options. These options will work only if you have installed the trial version of the product already. If you haven’t installed the trial version, you can use the windows installer and enter the product key for activation at the time of installation.

Or you could go to the Update and Security option from the settings. And then click on the Activation tab and enter the product key by clicking on the Change Product Key link. Your windows will be activated without any hassle.