The new NIC network is restricted or disconnected.

Note: The network is limited or not connected, because you have not manually set the IP or the firewall of the system itself has not been turned off.

Solution: 1. Change all the IP manually set by the network card into automatic acquisition. If there is no setting, it can be omitted. Enter cmd at the beginning of the operation, and then enter IPCONFIG again. You can see three connections. The first is your intranet IP, the second is your word mask, and the third is your gateway. Then, click the right-click property of the local connection, double-click TCP/ IP to choose to use the following IP address, and then enter the first IP sub-mask 255.255.255.0 that you just saw. By default, you can set the gateway. Enter the third IP you just saw, usually X.X.X. 1 DNS. This is your local area, or you can leave it unchecked, then click Advanced Settings, choose to stop the firewall that comes with the system, and then confirm all the time.