Connect two computers using an Ethernet cable

If you need to share the data between the computers and if the network is lost, then you cant use normal Ethernet cable to transfer the data, you should use the cross wire Ethernet cable to transfer the data.

• Plug the cable in 2 PC's
• Open network and sharing centre in control panel [ type control in run command and click enter]
• Click on  the option unidentified network and select the message network discovery and file sharing settings and click on option "Turn on network discovery and file sharing"
• Type the administrator password if promted.

for more details, please refer in   Wiki How