If your Windows 10 system is not activated, Windows will not allow you to personalize your desktop (such as personalizing your lock screen, wallpaper, theme, etc.) and it will show a watermark on the bottom right of the screen that says “Activate Windows. When you try to personalize Windows 10, you will be prompted to activate your Windows 10 after installing Windows 10 on your computer. So for those who do not have the technology it will be a very easy guide. (Probably within a minute, if you do all the steps as mentioned) Because here you do not need to install the Windows 10 Activation Tool or the Watermark Remover Tool or anything for activation. This is the fastest way to activate a Windows 10 product. This post will give you a step-by-step guide that will teach you how to activate Windows 10 on the command line. Most PC users are not aware that they can even activate their Windows for free, so you may want to bookmark this post for future reference. In today’s guide, you will learn how to activate your Windows 10 computer using only the command line, commonly known as CMD or Command Prompt. Note: This method for activating Windows 10 for free with CMD is still (May 2021), so if this does not work for you, you may not follow the steps carefully.