I have a wireless connection on my Desktop PC and also on two laptops. The newer laptop runs at 130 mbs as does the Desktop (I changed the adaptor for a faster one) the older laptop runs at 54 mbs. I notice that from time to time the connection fails and shows a message "limited connectivity" this occurs on both desktop and older laptop. The connection will then reset and work O.K. The other thing that I notice is that the speed deteriorates and also tends to recover. Usually it is possible to perform a "Repair" which will restore the speed back to the maximum. Is there any explanation for this strange behaviour?