A Wii System Update will add new features to upgrade your Wii console.
To update your Wii console to the latest version, simply connect your console to the Internet and manually select "Wii System Update" from the Wii System Settings page.
You may use Letter Bomb, Indiana Pwns, Smash Stack, Eri Ha Kawai, bathaxx or Return of the Jodi to run the Hack Mii Installer for Homebrew Channel and Boot Mii.
Please note that these deletion measures will not affect Wii consoles that contain only normal save files.
Wii system updates are required before playing some games, like The Sims 3, Super Mario Galaxy, Doctor Who: Return to Earth, Iron Man 2, and certain Guitar Hero and Rock Band games.
When loaded into the disc slot, an icon on the Disc Channel that says "Wii System Update" appears.
There are also different versions of IOS249 that can be installed into any of the slots and these versions are determined by the base IOS used.
For maximum compatibility and ease of updating, this tutorial now gives you the following setup: Slot 248 - Base 56 - Compatibility with most games and slightly faster read timing.
You can check the version of your Wii console by looking at the numbers on the top right corner on page 1 of the Wii System Settings page.