Based off the info you provided here
, I'd say your ipconfig is not returning data because your nic is malfunctioning. Have you tried uninstalling and reinstalling the nic via device manager? The thing that is getting me here also is you mention that you cannot get online with wireless either? Does the wireless connect to the AP but not get an IP address? What is the behavior there?
Just a stab here but perhaps windows update pushed you a new driver
and it didn't install properly for some reason.