Why can't I connect to MY OWN Wifi?

I've had the same router for about 2 years now and not a single problem. But for the last week, my laptop wont connect to it. My other laptop can, my ipads can, my xbox can, and my desktop can. It started right when I went online and changed the name of it, thats all. Now my computer wont connect to it anymore. I've reset the router, unplugged it all and re-plugged it in, reset it, called Verizon, which is my provider, and they said they couldnt help me. I have a LOT of work to do online and I can still get Wifi from my neighbor but the speed is slow as hell. I mean, if I'm paying for Hi-Speed internet, I better get Hi-Speed internet! Lol

Have you tried deleting the wireless profile from the problem computer?

Does the computer connect to your router fine through ethernet?