The other day I unplugged my ethernet cable from my desktop to use the internet on my laptop. When I went to plug it back into the desktop it wont identify the network. Several things I have tried so far: ip config/release and renew, reset the router, tried a different cable. I'm using windows 7 and the 2wire router that came with the uverse internet. I diagnose the problem and it says "Local area connection doesn't have a valid IP configuration". Any ideas as to what the problem is?