Once activated, you’ll have access to all the features of Windows 8.1, including personalization options, security features, and more. You’ll need to provide your product key, which can be found in the “About” section of your PC’s Control Panel.
Simply download the program and run it, then follow the on-screen instructions. KMSAuto Net 2016 is a fantastic program that allows you to activate your copy of Windows 8.1 for free.