Control panel, then network connections Right click on the wifi adaptor connection and choose "properties" Double click the "Internet Protocol (TCP/IP)" entry On the general tab of the dialog use the radio buttons to select the options to specify IP and DNS addresses.
Set the IP to a valid one for the network, and the DNS entry to match the address of the router (probably 192.168.0.1 for a virgin home hub).
OK your way out of the dialogs.