If you have the wrong WPA key, you can also have this problem, I would first see if you can access your router by its IP(ie 192.168.X.1 . The X can be 0,1 or 2 on most routers), if you can not, you may have a problem with the wireless connection it self.
In that case, I would connect with a wire to ensure you at least have the system working. If not, you have to then ensure that your internet it self is working or that your computer does not have a setting issue/maleware causing this.
Thank you Nukemaster for trying to help as well. I was typing my response as you were typing yours so I didn't see it until after.. but it's working now. I appreciate you taking the time to try to help me with this!