IMPORTANT NOTE ABOUT STORED INFORMATION ON YOUR Wii CONSOLE:
Nintendo will make every effort to keep any saved data on your Wii console intact. However, due to the nature of the problem you are experiencing, this may not be possible. In cases where saved data cannot be restored (e.g., game save data, emails, addresses in your Address Book, etc.), your Wii Shop points and previously downloaded games will still be available to you. To gain access to your Wii Shop account once your system has been returned, you will need to enter the Wii Shop and re-download your games at no cost.
Please do not return your system to the retail store. All of your Wii Shop data, including games and points will be lost. They are non-refundable and non-transferrable. If this is not important to you, and you elect to return your product to the store, you must first follow the Delete Usage procedure described in your manual to remove any personal pictures, email addresses or other information that may be on your system.