Updating my wii
Always running the game with a USB Loader is another solution to avoid the disc update.
Question: How Do I Update Wii Channels if I Have Homebrew Installed?
SDHC card support, Wii shop access, ability to run channels that were previously saved to SD/SDHC and a fix for a bug in Wii Sports Resort. Some bug fixes in The Conduit multiplayer and a slightly faster startup time. If you are very cautious, you can remove all risk using PART 1 of the Upgrade method first. Wii is the first of these games and most future games do too. The first upgrades you to 4.1, the second upgrades your boot2.
The official update is very slightly unsafe (Equally as unsafe as if you had homebrew), although you can remove the risk using PART 1 of the Upgrade method. It is the boot2 upgrade which is slightly dangerous, but it can be avoided by PART 1 of the Upgrade method.
If you are running the final Wii OS version 4.3, then you probably shouldn't have to worry about this.
If you're running something earlier, though, you'll need to use the instructions below.