My son had just bought a new computer system (AMD processor, Windows 7) fitted with a number of USB 2.0 and 3.0 sockets.
When trying to connect to the net, it appears that only plugging the network adaptor into one of the sockets on the top of the case allows the system to connect to the router. The connection fails when the sockets on the rear are used
Apart from it just being a hardware fault (!) is there any simple explanation of why this might be?