Sharing your WiFi Internet through the Ethernet port, Windows 7

1- Connect to the Internet (using WiFi)

2- Press Start button, Control Panel, Network and Internet, Network and Sharing Center, Change Adapter Settings from the list on the left side.

3- Right-click your wireless connection and select Properties.

4- On Sharing tab check in the check-box "Allow other network users to connect through this computer's Internet connection."

5- Check "Allow other network users to control or disable the shared Internet connection" check-box as well and press Ok.

6- Plugin the ethernet cable to your computer and the other side to another computer or an ethernet switch / router.