I resolved the problem. When my router lost power, somehow the addresses got changed so the IP address of the wireless Dell computer no longer fell in the pool of addresses maintained by the router. When I reconfigured by router and had released and renewed my IP address on the Dell computer, everything started working again.
Thanks for your help!
Could you please provide more of a step by step as to what you mean by "reconfigured my router"? I have been working at this for hours and can't figure out what is going wrong. All computers, ipod touches, PS3 connect with no problem, but my Dell running
Windows 7 is connected but won't load anything. I ran diagnostic and got same error "DNS Server not responding"
Please help