Go to Settings > Update and Security > Activation, and use the link to purchase a license of the correct Windows 10 version ... especially Home, and you wish to upgrade to Pro, this Windows ...

For example, if you have a license for the Windows 11/10 Home edition, you cannot use it to activate Windows Pro or other ...

This is an ultra-low price for a full retail license of Windows (from a reputable and reliable source, of course). We used to offer a similar deal for Windows 10, but with its end-of-life date ...