One of our Dell Latitude D630 laptops was transferred to a new user, and before I gave it to the new user, I wanted to re-install Windows on it and give the new user a "clean" installed system. The problem is, we have a software tool that uses the MAC address of the Ethernet adapter to verify a license file. I have never heard of or seen a MAC address change on an Ethernet adapter before, but after the windows install, it appears the MAC address HAS changed!? Is this normal? Maybe because it's a Dell laptop, the Ethernet adpater is some sort of virtual adapter, and there isn't a mac address burned into it?