Mike in your PC's networking settings, uncheck "obtain an IP address automatically" and set the IP to one in your range, i usually do like 192.168.0.69 - and set the subnet mask to 255.255.255.0 and set the gateway to 192.168.0.1
depending on your OS, it may or may not let you leave "obtain a dns server automatically" checked after you unchecked the IP setting. if it doesn't, go on to your ISP's tech support website and poke around for their DNS server addresses.