Why I Hate Computers #882914038

So apparently while I was gone for my long weekend break, something happened to my laptop at home. It will connect to the wireless router, but I can't get online. I've tried shutting down and restarting, I've tried using Dell Support to walk through the settings, but nothing works. I'm pretty sure something is screwed up with the settings but I'm not knowledgeable enough about this stuff to know exactly what. And because I'm a cheapass, I didn't buy the extended service package from Dell that would enable me to call them and have them help me out.

Any ideas on how to fix this, aside from bringing it in to work and begging the Help Desk guys to help me? Anyone?