Hebei University of Technology campus network client always occasionally does not display the network card! ! ! Shortly after reinstalling the system, the campus client stopped displaying the network card. It's not easy to go to the security office, ask where the school computer room is, and then let them help you out. This problem is not clear on Baidu. If the local connection is not displayed, there is nothing wrong with the driver. It may be a problem with the network card, or the network card should be cleaned and erased with an eraser to see if it is plugged in. If not, please determine the IP address and subnet.