Hi ,
If you purchased a key separately and upgraded to Windows 10, you will be able to use this license on Windows 11. In this case, you just need to use the same Microsoft account if you purchased a digital license or if it is a product key, you just need to remove the license and install Windows 11 with the product key that you have and log in with the Microsoft account used so that it will be activated when Windows 11 starts up.
Since you are already using it, if you are going to upgrade the CPU, I recommend doing a clean installation for Windows 11.
You can use showkeyplus (https://apps.microsoft.com/detail/9pkvzcprx9nv?...) to check your license that is installed. To make a note of it before installing for Windows 11, just access the command prompt (admin) and run the command slmgr /dlv to remove the installed license.
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Independent Advisor - Community
Thanks