Instructions
Turn on the Xbox 360 and go to the "My Xbox" tab.
Scroll over to the right and select the "System Settings" tab.
Select "Memory" from the system settings menu.
Highlight any of the storage devices listed and press the "Y" button on your Xbox 360 controller (once you choose to clear the cache on a selected storage device, the cache on all installed storage devices will be cleared).
Select the option to "Clear System Cache." This will remove all your game updates and hopefully resolve any playability issues you have been experiencing. You will be prompted to download the latest available updates for your games when you play them again.