Nintendo has released System Menu 4.2 in all regions for the Nintendo Wii. It's very much a killer update, so DO NOT UPDATE if you wan't to carry out using whatever you already use.

Changes:
  • Deletes homebrew channel.
  • Now uses IOS70. (No Preloader due to that)
  • Wii Shop Channel updated. Use WiiSCU to update the shop channel. Use NUS Downloader to download the Wii Shop Channel v17
  • Most of the IOS's have been updated or stubbed.
  • Updates your boot2 to boot2v4 (what LU64+'s have). (That means no downgrading of any IOS, and due to that, you can't revert back to your old System Menu. So BootMii as boot2 installed is removed.)