Usually, you'd activate Windows 11 (or 10) using the Settings app to enter the product key. However, if you're in an ...

If, for some reason, your Windows 11/10 online activation fails completely, you may see an Activate by Telephone option in the wizard. You can always use the Product Activation Wizard and use the ...

Windows Activation ... product key and the installed Windows 11/10 version must be the same. If you purchased a product key of Windows 11/10 Home and you enter it on a Windows 11/10 Pro copy ...