Once you own purchased excellent activation license, it is possible to activate Windows either online or by phone. Activating your license online could be the easiest option, since it simply requires entering your product key. You can besides power up simply by phone by following the prompts provided during the activation process.When purchasing an activation license, be sure to be sure this's compatible with your version of Windows. Activation licenses for Windows 11 Pro and Windows 10 Pro are not interchangeable, so ensure you select their right license for your operating system.