on a fresh Windows 8.1 Pro install that I update to 10, upgrade is failing at 87% (stuck with no action forever). When rebooting it rolls back to 8. So I decided to install a fresh 10, and it works just fine! However, as the upgrade process did not complete, license transfer did not occur. However, I have a shiny c:\windows.old.000\panther\GenuineTicket.xml which I suppose validates the license upgrade; the question being, how can I apply it to my installed 10? It's certainly a simple step that never got to be executed in the upgrade process.