To clear your Xbox 360 memory cache, do the following: go to the "System" blade and access 'memory' then highlight your console's hard drive. With the hard drive selected, input the following buttons: Y, X, X, LB, LB, X, X. A message will appear asking you if you wish to perform maintenance on your Xbox 360 storage devices. Select "Yes," and within a few moments your Xbox 360 hard drive will clear its memory cache. Keep in mind that clearing the memory cache will remove all software updates that you may have downloaded for other games, so you'll need to go and download the updates again. That fact alone obviously makes this an advanced technique that could have unintended consequences in the wrong hands.
