I have a piece of software that requires a etwork card in order to generate its license, so I bought a Realtek 8139 and installed it, created the license from the address given, great. My problem is that every other time I power up the pc, the NIC changes its address so consequently my software wont start up. It only changes the last 2 digits from 60 to 64. I manually changed the address in properties but the software still reports back a changed address. Any ideas ?? Software is Pro-Engineer Wildfire.