There is a reset button on the Wii. How can I reset my Wii?

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I am donating my Nintendo Wiis to a group of people who are deserving of them, however after turning them on for the first time in ages they are all full of old saves, network settings, games and game saves.

The answer is based on official guidelines from Nintendo.You go to the third page of the Wii's settings and then select 'Format Wii System Memory'.Press 'Format' and 'TA-DA!'All the data will disappear after you reset it.You can't restore it.

The Wii button in the bottom left of the screen can be used to open the Wii menu.