Hello there, I've a problem to ask you guys. I had a Wiikey modded NTSC Wii version 3.2 ; and I updated to 4.0 through this guide: http://gbatemp.net/index.php?showtopic=144835 I used it fine for a while, but then I tried to play a backup copy game of my own (NTSC). Couldn't make it run (probably from the disc...) so I tried the original copy I had (PAL). It didn't run also, so I tried the NTSC again... But when I restarted my Wii, I got the message "The System Files Are Corrupted...". The message is also corrupted, I've to swing the wiimote a bit to make it readable. I don't have a NAND backup but I've the things installed ready in that guide. What can I do? I tried to install preloader 0.29 again but i still get this same error. I can access both bootmii and preloader fine, but still get this error upon selecting Systemmenu. Edit: I only use my wii to play games, and want to use homebrew channel maybe to install VC and WiiWare games. I don't really knew what I would lose upon installing 3.4 or 4.0 directly, so I installed with that guide just in case. If there's a way to return things back to normal 4.0 or something, let me know about them too please. Thanks.