We have ATT DSL with a 6 mbps download speed and a home network set up. We have 3 computers on this network. Lately I have been experiencing terrible lag issues (my computer is attached through a wall plug that sends the signal through the outlets in the house). I recently discovered however that when I unplug my brothers computer from the network, my lag issues immediately go away. Is there any way to fix this without having to unplug my brothers computer?