Client firewall? Check whether it is configured to allow internet traffic through the LAN. DHCP server? Check the client list in the router's config interface and check that the IP assigned to the problem client is correct - 192.168.2.1 for the Belkin router's gateway, typically 2.2 onwards for wired clients and the next available after that for wireless clients. Basically in all the numbers from 2.2 onwards. Then check that your client's iternet connection settings are set to use the LAN.