I was out supporting a business client today that was having problems with their ethernet connection. The connection speed starts to crawl after going for a while, but unplugging and replugging the ethernet cable from the computer resolves the issue and then it goes through the same cycle again. I am using a Via Rhine Fast Ethernet adapter and device manager indicates that it is working properly. The customer has 5 ethernet jacks and if I recall on a previous call; It was plugged into another port and I moved it into the current working port. Any ideas on this?