Things You'll Need
Instructions
Turn on the Wii and ensure it is connected to the Internet.
Move the Wii cursor to the bottom left-hand corner of the screen and click the Wii button. (A Button)
Click the Wii settings icon (looks like a wrench). (A Button)
On the bottom right will be a flashing blue arrow. Click it twice to reach System Settings 3 (page 3). (A Button)
Select "Wii System Update." (A Button)
Select "Yes" to continue. (A Button)