My laptop isnt working it says limited or no connectivity!!!!!?

Since you didn't specify your OS (eg vista, xp) what you should do is check your manufacturer's website on how to setup a wireless connection. Why I'm suggesting this is if you have a Dell they have their own proprietary wireless utility. Some other laptops use windows to manage wireless networks. This did happen to me on a Dell Vista desktop and I had to replace the NIC card. which is about $40 for a cheap one.