some of you guys are giving him ridiculous suggestions.  if you reset the router you will lose all settings, you cannot restore as its a newly formatted computer.  Like someone suggested use hard wire to get connected then update driver for the wireless nic besides that if your physical nic is not talking you gotta find another computer get the latest driver from dell and update it.  No need to reformat again as you will come across the same issue.  Also you can try to update your OS....some issue might be resolved....