I have someone who came back after some months with a re-rolled laptop. Our wireless access to our network is MAC filtered, and his MAC address is programmed in. So he connects wirelessly fine it looks like. My own laptop and a couple others are working fine off the same point that also use MAC address filtering.
The DHCP server is giving his laptop everything BUT the gateway address for some reason. Thus, no internet access. Actually, no access either to local network. The DNS and all the settings appear correct.
I can not figure out the problem.