Well, there is an easier way...
Depending on your problem, that is...the pic above has an Automatic Private IP address, so it is simply not getting the IPv4 Address from the router. Try disabling the IPv6 in the NIC properties and disable/enable the adapter...then check for updated drivers (i use the x64 Vista one as the most recent update for mine)
For the "Unidentified Network" issue...that one is harder, but I figured it out and it is nothing more than stopping/disabling the "Bonjour DNS Responder" service, followed by a disable/enable of the NIC...and here is the detailed explanation for that:
***VERIFIED CAUSE of UNIDENTIFIED NETWORK***
Check to see if you have this little devil in your services list...