Well, first sorry for my bad english, and thanks all the team for this amazing piece of software!
My friends Wii had a problem that I don't know if it's related to the use of cfg USB Loader, but I thought that it would be interesting to relate nonetheless. Might be just a bad coincidence, but who knows? Maybe this info could be useful for someone...
Well, I've softmodded a friend's Wii for the sole purpose of using an external hard drive to put his games on. This friend's Wii has a modchip installed (I think it's an old WiiKey, he bought it second - or third, ou fourth - hand.). He is on 4.2 sysmenu. I've used bannerbomb, softmodded following mostly the guides on this site, everything was fine.
This friend is a tech savvy person, but with no time or inclination to play with the internals of his Wii. He just wanted to play his own games without hassle, so I take his word that he didn't messed up with the videogame further.
Then disaster (almost) struck: after playing an import game from the usb (Xenoblade), next time he powered up his Wii, after the health and whatever screen, the message "System Files are Corrupted" appeared. No rebboting or resetting or name calling changed it. After some panic and before trying anything else, we popped in his original copy of New Super Mario Bros in the DVD drive. The Wii powered up, the System Menu loaded as normal, all settings acessible, all good. Heavy using and testing before, everything looks fine.
Oh, his Wii is a USA one, 4.2 system menu, modchip (don't know the model).
He deleted Xenoblade for good from his HD (he can't speak japanese anyways), but some questions remain:
1- Is there any relationship between the two things (USB Loader, import game and semi-brick)? Or it's just a bad coincidence, and his NAND is starting to (physically) fail?
2- The Super Mario Bros trick worked because it contains the 4.2 sys menu update, or it worked because of the modchip? Or it was just another coincidence?
3- In the other hand, is the modchip responsable for this mess?
4- This same Xenoblade runs fine on my Wii and HD. I have no modchip, but my Wii is an USA Sysmenu 3.3. Is there some risk involved? For turning the Wii off directly, for example? I don't really remember what I do when I finish playing, but I think that I exit using the home button, then I turn off the Wii. Dunno.
Anyway, this problem is solved, but I just wanted to share the info. I think there's no relationship between the two things (cfg loader and the semi-brick), but I'm still trying to understand it.
Oh, I've posted here in the case it's loader related issue. If it's not, this post can be moved elsewhere, ok?
Thanks everyone
PS.: This friend's Wii has Priiloader installed, but it wasn't necessary to recover using it.
Edit: Yoda says: "Engrish grammar hard it is. Correct it you must have. mrh"