I figure I should ask people who actually know what they're doing. I used
https://sites.google.com/site/completesg/ to mod my wii, downloaded wiiflow, got some games and everything ran smoothly. But a few days ago I let a friend use my wii, he played some goldeneye and got online, I thought nothing of it since I usually play brawl online too (I'm not sure if this is important but he was the last person to use my wii before it got messed up, I asked if he did an update or something but he never gave a straight answer). The next day I booted wiiflow just fine but when I loaded a game it played the one I had in the disc instead. I tried again, this time without a disc inserted but the screen just went black. I downloaded configurable usb loader and when I ran it, it said that "cios 249 is a stub" and to reinstall it. So my question is do I just reinstall the cios, is it that simple? I also remember skyward sword asking me to perform an update when wiiflow was working, but now it's not asking for anything and goes straight to the game. I ran a syscheck as well, would that have been simpler? I'm worried about bricking my wii and just want to be on the safe side, any help would be really appreciated.