On your main PC (the server) open Control Panel -> double click Network Connections -> right click your network connection (the one connecting the two PCs) and select Properties -> select Internet Protocol (TCP/IP) and click the "Properties" button. Click Use the following IP address and enter IP address: https://www.192-168-0-1.us/routers-default-ip-addresses/ Subnet mask: 255.255.255.0, leave default getaway blank. Select Use the following DNS server addresses but leave blank.