I am using a lap top at the moment but I do have a desk top computer HP Pavilion with Windows 8 and I can sometimes get on to the internet - I am with BT Hub 3 router - but it keeps going on to "connection is limited " and I cannot get on at all. I have done various trouble shooting tests and it keeps coming up "wi fi does not have a valid configuration. Does anyone know how this can be fixed as it is driving me crazy. I have tried ringing BT but they were of no help.