VIA Rhine Family Fast Ethernet Adapter
To uninstall driver, Control Panel -> System -> Device Manager -> Via Rhine Fast Ethernet Adapter (on the tree) -> [Driver] tab -> Uninstall button on bottom. If the device has stopped working, best bet go to you local computer supply store, e.g. Fry's, Staples, Best Buy depending on where you live and get a PCI LAN card a throw it in. A good one can be had for $20 US and will probably be a faster connection for you in the long run.