To find your Ethernet/MAC address on a Windows computer, go to the Command Prompt. Click Start->Run->cmd. When the Command Prompt window appears issue the following command:
Your Ethernet address will be listed in the Ethernet adapter Local Area Connection section called Physical Address. It will be a 12 alpha-numeric string separated by "-".
If you already have Fledermaus installed, you can browse to C:\Program Files\QPS\Fledermaus\lmutils\ and run the lmtools.exe file. Click the System Settings tab, and the Address can be found in the Ethernet Address field.
If there are more than one Ethernet Addresses listed, please provide us with the first.