got a pc that has been up and running for a couple of years that is not resolving dns names intermittently, like my server. can ping the server ip fine but cant ping the server name. netbios is on, firewall is off. when i go to network->entire network" only the local computers on the lan show up. the server is on the wan. checked ipconfig /all and the dns settings are right. did a ipconfig /flushdns and still does not work. not sure what else to check. its only effecting this one computer on the lan.