Network hardware and wiring has not changed. Put a new MB into my main computer that has 10/100/GB. Now I have to unplug and replug the network wire to get the router to issue an IP address. The hardware shows as connected ok (green lights and indication from windows the network is connected) tthe problem is just the IP address. The router is an ancient Linksys BFESR11 and somethmes needs to be reset to restore lost connections, but this problem is a totally new feature. PS Didn't there used to be a netwokring forum here??? I counldn't find it.