I have a Dell, Windows 8 laptop, and satellite internet providers , but can't connect to the Ethernet. There is a PC that uses the same cable, and I have a sibling that has a laptop as well. The cable will only work for his laptop, and the PC but not mine. Recently, a friend told me that "his laptop blocks my IP from using the cable". I'm very unsure what to do, as I need this laptop for course work over the year, but can only get a connection in town, or the campus I go to. I'm kind of desperate...please help.