Unfortunately, Windows does not have this capability on its own, or very limited should I say. however, most newer keyboards come with 3rd party software that allows this.
Here's How:
Click on Start and then Run.
In the text box in the Run window, type regedit and click OK. This will open the Registry Editor program.
Locate the HKEY_LOCAL_MACHINE folder under My...
Use the Activation Wizard
If you have only a few volume licensing product keys to change, you can use the Activation Wizard.
Warning!
This document contains instructions for editing the...