Things You'll Need
Instructions
Power down the Wii and connect an Ethernet cable to your computer through the LAN adapter. Plug in the LAN adapter's USB cable to your Wii console.
Power on your computer and click the "Start" button on the bottom left-hand corner of your screen. Choose the "Control Panel" option. Click "Network and Internet" and choose "Network and Sharing."
Select "Manage Network Connections" and right-click the dial-up icon shown on the list to reveal the options. Choose the "Properties" option.
Click the "Sharing" tab and check the box that lets other users connect through dial-up. Click "OK" when finished to start the dial-up connection process.
Power on your Wii when the dial-up process is complete. On the Wii main menu, select the Wii icon in the bottom left corner.
Select "Wii Settings" and navigate to the second page. Select the "Internet" icon. Click "Connection Settings" and choose the dial-up option, which should be "Connection 1."