Instructions
Go to the "My Xbox" menu from the Xbox 360's main menu. Select "System Settings." Choose "Family Settings," then "Console Controls."
Enter any incorrect pass code. A message notifies you that the pass code is incorrect. Choose "Reset Pass Code."
Answer the security question that appears. This question was provided by you when the original pass code was set up.
Enter a new pass code, then confirm it by entering it again. Choose a new pass code reset answer. Select "Done" twice, then "Yes, Save Changes."