I have two Surface 3's both connecting to a Virgin Media router. One of them connects fine on the 5gig connection but the other will not. It says that it is connected but the Internet performance is simply not there. It works fine e on the other connection in that router which is 2Ghz. The other surface works fine on both. Any ideas? Both running Windows 10. Is it possible that one of them has a hardware problem on the WiFi part?