All Games Show Only Purple Screen

[MayImilae]

That confirms there is a problem with your configuration. If you don't mind a settings reset, you can copy your saves to the new user folder by copying the GC and Wii folders. That would probably be easier than hunting down the precise setting that was causing this.

But if you do want to find out what happened, you could turn on one by one each changed setting you have in the screenshots, and see if any of the specific settings result in the issue.