So I've run across a very puzzling, yet interesting issue with a customer. There is a single computer on their network that refuses to identify and connect to the internet. That's not what's puzzling, however. The computer works within the network and can communicate with other computers on said network. In the office where the computer is located is another computer (pc-server) that feeds from the same 5-port hub as the computer that doesn't connect to the internet. I've tried swapping ports, still the same. I brought the PC in question back to the shop only to find out that it works here perfectly. Had no hitches and the internet picked right up. I take it back to the customer and on their network, again it doesn't work. What would cause a computer, on a network, not to attain an internet connection when all external factors seem not to be the cause? Keeping in mind that it works elsewhere and shares connection points with other machines that also work.