Hi I have been having some real troube with my home network ISP: Optus Modem: SB5101 Switch (brand new): TP-Link TL-SF1008D I was using everything normally, the whole network worked as normal, then I rebooted, and all of a sudden all this happened. The modem only connects to one computer (the closest), and doesn't connect to the other 3 even if the close computer's unplugged. One 25 Metre cable connects to my main pc (vista), the other 10 Metre cable to a windows xp pc. The close computer runs windows xp. If I try to connect any directly to the modem, the close pc works, but the rest don't. I also tried with a laptop (didn't work). I replaced my router but it still didn't work. I have also tried switching around the cables to different ports on the router, but that doesn't work either. I also tried using a pci network card on my main pc, but that didn't work either :doh: I don't see what ks making two of the pc's not work, so suddenly.