Problem with Dell Inspiron/Netgear wireless router

I own a Dell Inspiron E1505 with a Motorola modem and a Netgear N600 wireless router. Everything was fine until earlier this week when a power outage hit. Since the power came back on the wireless icon in the lower-right hand corner says the computer is hooked up to my wireless network with signal strength of “Excellent” and a speed of 54.0 mbps but I cannot connect to the internet. Google Chrome gives me this message:

The server at (website) can't be found, because the DNS lookup failed. DNS is the web service that translates a website's name to its Internet address. This error is most often caused by having no connection to the Internet or a misconfigured network. It can also be caused by an unresponsive DNS server or a firewall preventing Google Chrome from accessing the network.

Internet Explorer and Firefox also do not connect.

I’ve tried disconnecting power to both the router and the modem- for a few seconds, a few minutes, and finally overnight before going to sleep. I’ve tried right-clicking the icon in the lower right corner and repairing the connection. And I’ve tired disabling the firewall to no avail.

Any suggestions?