Halo MCC Not loading.

Hey,
I have not been able to play Halo MCC since the Reach update. Everytime I hit start on the main screen the game crashes on me. i have done the following.

*Deleted and re installed the game.
*Clear sync data.
*Removed account and add it again.
*reset the console without removing games and apps.
*Chat with support an they told me all the troubleshooting was done and redirected me here.

So, What can I do. I NEED to play reach!

Thanks all!