There is a problem with your dvd drive. The drive may be bad or become partialy disconected. Also the wii may have modchip autobooting games as I don't think you should get the error from the disc channel until the game is clicked on to load. You need to open up the wii and reconect the cables to the drive. If there is a modchip you should remove it if possible. You may need to replace the drive.
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