Things You'll Need
Instructions
Plug an ethernet cable into a free port on your modem or router and run it to your Nintendo Wii. Make sure the console is turned off.
Plug the Nintendo Wii LAN adapter into the USB port on the back of the console.
Connect your ethernet cable to the adapter and turn on the console.
Use your WiiMote to select the "Wii Menu" icon at the bottom left corner of the screen. Click the large "Wii Settings" button.
Click "Internet" and then "Connection Settings." Select a connection with "None" next to the name.
Select "Wired Connection," then press "OK." Your console will connect to the Internet and download the latest updates to your Wii software, after which you can begin using Nintendo's online services.