Hi! I have set a earth cable (30 meters cable) under the floor and it is working very well, nothing changed on computers, all i had changed is the setings on ps3 and plug cable. If anyone wants to chage the channel and don't know how, i sugest to ring your internet provider, that is what i did last year, they just login my computer and chaged on that ocasion, but the moden was just on the side of ps3, this year i've move and now the moden is too far so the best option. is get a long earth cable and plug in. If you are too far the wireless conection gets too much interferece.