Activation helps verify that your copy of Windows is genuine and hasnt been used on more devices than the Microsoft Software License Terms allow.
When installing Windows 11, the digital license associates itself with your devices hardware. If you make significant hardware changes on your device, such as replacing your motherboard, Windows will no longer find a license that matches your device, and youll need to reactivate Windows to get it up and running.
To activate Windows, youll need either a digital license or a product key. To find out which you need, see What activation method do I use, product key or digital license? inActivate Windows. Then, use the following info to help you successfully prepare for a hardware change and reactivate Windows.