Since Pro/Engineer uses the network MAC address as its key for licensing I find myself running into trouble every time I build a new machine, most of the new machines have onboard network adapters and my Pro E license is tied to a card Imove machine to machine; so in order for your license to work correctly you must "re-arrange" the order of the multiple network adapters in Windows Regisrty.

You will need to do some registry editing to tell Windows which one is the primary MAC address.