Ok, So I have a wiikey modiefied Wii. I bought a wiifit the other day (Thursday) Had to update the wii which I did to 4.0E. Couldn't get it to load on the day, kept hanging after around 10 seconds of initial os startup. Managed to get it going by starting up without the wiifit disc in the drive, then slipping it in and away we went. We had a good couple of hour session on it no issues atall. Come to fire it up again today and it will not kick up with the disc in, same lock up routine everytime. If I fire it up without the disc in, I can browse all the settings and menus. Insert the disc, It doesn't recognise it and just locks up. There doesn't appear to be any significant scratches on it, and I do look after my discs, that and it;s only been out the bloomin box twice! Wii Sports and Wii play discs both work fine which leads me to a bad disc. Anyone had/dealt with a similar problem?