use your command window. make sure you login as an administrator. type "ipconfig /release", wait for a little bit and then type "ipconfig /renew". That should reset you ipaddress settings.
Your router has DHCP on, so it automatically assigns the ip, gateway and dns. Don't mess with these numbers unless you know what you're doing. Type ipconfig /all and let us know what it looks like.
Your DNS server should point to the router, 192.168.1.1.
On the address bar, type 74.125.67.100. You should get the google page. If google page displays, then you've got dns problem.
Bring up the router's config page. In your case, it's probably 192.168.1.1. Check out the status page. Your WAN side probably show your DNS to be 64.233.217.2. Open your cmd window and ping it. You should be able to ping it.
On your LAN side, the DHCP server should be on enabled.