This new wii that I recieved back from nintendo is always constantly locking up and with a large buzzing noise. It's very irrating, I'm trying to play 2 player wii sports with my brother but it's always locking up before I can start a game, whether it's at the character selection screen or press a+b button screen. It looks like to me a bad memory, maybe if there is one a defrag or checkdisc program for the wii?