Once the command prompt finishes releasing and gives the ip report, type in the command prompt 'ipconfig/renew'.To release type in the command prompt 'ipconfig/release'.To be able to release and or renew, you have to right click on the cmd program and click 'run as administrator' (this is the case for all users, including admin users).The MAC address is in the following composition XX:XX:XX:XX:XX:XX which includes only digits from 0-9 and letters from A-F.The one for the NIC should be titled 'Local Area Connection'.This will retrieve a list of all the networking devices on the computer.The results should come back with 1 hit and it should be cmd or cmd.exe.In the area marked 'search' write 'cmd'.MAC address is listed after Physical Address.Click Start > Run > Type in CMD hit enter.Windows 10, 2000, XP (Home, Pro and Media Center).This will show you how to find the MAC/IP address.