Forum Discussion
How to reinstall SQLserver license on another PC.
Regarding the old server, you need to uninstall the server if you are not going to use the license anymore or downgrade it to a free version (assuming all you existing use support the edition).
That's it. Next, in your new machine install and use the license key.
By the way, usually I highly recommend Not to use the forum for LICENSE questions. It might look like we understand since we orders several dozens licenses ourselves, but I learned that this subject can be very complex and you better read the small letters and understand it 100% before you recommend someone. This is less related to a DBA or any technical person and more to administrative.
If you are in north America you can call 1-800-426-9400, Monday through Friday, 6:00 A.M. to 6:00 P.M. (Pacific Time) to speak directly to a Microsoft licensing specialist, and you can get more detail information from them.