You connect two or more computers with a switch. You will need a device to act as a DHCP server and probably a DNS server. If that all sounds over your head, you should probably call someone.
A home router will function as both DHCP and DNS server, and would set up the lan connection for you.
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1. Turn off windows firewall and all other firewalls from both computers.
2. Go to Control panel->Network setup wizard. Fill in the information for both computers. When it asks for a workgroup put in "GAMING" for both computers. When this is completed it will ask you to restart the computer. Restart them real fast.
3. Once restarted go to Control panel->Network connetions. Right click on local area network and go down to properties. Scroll down in the items this connection uses box to internet protocol (TCP/IP). Click on that and click on the properties button. In the next dialouge box check the button that says use the following ip address. For the computer that is going to host the game set the ip as 192.168.0.1 and the subnet mask as 255.255.255.0. The other computer now sets his ip as 192.168.0.2 and his subnet mask as 255.255.255.0.
4. Start starcraft and go into multiplayer.
5. Click Local area network (UDP).
6. The host machine with the ip of 192.168.0.1 creates a match.
7. Once the match shows up in the match list click join.
8. Have fun playing starcraft over LAN!
by going into your computers settings....then smashing it up and letting all your rage out, that should let you connect. if it doesnt trying doing this to your WiFi and also your phone :)