I Live in a two floor apartment and set up my wifi months ago. My dell Inspiron had no problem picking up the signal from any room up until a week ago. It suddenly stopped getting a signal unless it's in the same room as the router. It's not that I can't connect at all and it's not the router placement because it was fine before and my boyfriends laptop is still connecting fine. My wifi adapter is up to date and there's no interference on the router channel. Help!