The laptop is about 1 month old. It is a cheap Dell laptop. I can not get it to connent via wifi. It has over the last month worked on and off.
I went to the settings and it says

"wifi doesnt have a valid ip configuration"

I called my internet provider and they wont help with this issue. Our internet works and it works if I plug the laptop in. And my kids school computers are working wirelesslly. Our router is brand new and its a Linkysis e1200. It works perfect with every other computer here but I cant get this one to work.
/
Will someone help me get the computer set up? Or else I have to sit on the floor tethered to a 3 foot long cable.

My computer shows connections. It shows my router and my neighbors routers, it just wont connect properly.