The connect may fail in these cases:
1. 192.168.1.1 is not set up as the router's default IP address.
2. The computer's TCP/IP properties which used to configure the router settings are incorrect.
3. The router does not work and is unresponsive to the connections.
4. Windows and other firewalls both enabled.
5. The computer does not join the network.
6. The router used in the existing 192.168.1.1 network segment is same as the router's LAN network.