How to Connect Two Computers Together with an Ethernet Cable

The simplest form of connection between two computers is a direct connection, using a single Ethernet cable to enable data transfer. You must install networking cards on each computer if they do not currently have an onboard Ethernet port or a networking card installed. A networking card plugs into one of the PCI slots in the computer's expansion area and contains an Ethernet port.

Ethernet connection
The Ethernet port is on the back of desktop computers.
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Step

Plug one end of the Ethernet cable into the Ethernet port on the first computer. Make sure you insert the Ethernet cable's connector into the port completely; you should hear a click when the connector's retaining clip slides into place.

Step

Plug the other end of the Ethernet cable into the Ethernet port on the other computer. Make sure you insert the cable's connector until you hear the retaining clip snap into place.

Step

Boot up both computers.

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Click the Start button on the Windows 7 desktop, and click "Control Panel."

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Type "network" in the search box. Click "Network and Sharing Center."

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Double-click the Unidentified Network‍ icon at the top of Network and Sharing Center.

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Click "Turn on network discovery and file sharing" under Network.

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Provide confirmation if prompted.