my bro was complianing of the same thing on his computer. I called up opt online and they noticed that whenever i tried to do someting my signal dropped. they said it cud either be the modem or the router. So i connected directly to the modem and had the same problems so I'm going to replace the modem. Is this as easy as going to the store and buying a new modem and swapping or do I hafta register it or do somethin?