Xbox 360 Slim Reboot after launching a game !!

[nofeloniesyet]

are you installing these games from backups or legit discs?

i suspect you may be using truncated backups.

this actually happens on this game no matter how you install it sometimes,as said,disable the plugin and try.

 

[Beaver_Buffcoat]

it's 16747 , in my phat AC4 works without problem i can play it everytime

Things to try:

Enable the latest TU that you have in your list, making sure all others are disabled. Reboot & try to play. If black screen, go back to FSD & disable the current TU, then enable the prior TU. Reboot & try again. Repeat until no TUs enabled.

I had this same issue with AC:III and had some success by editing FSD content.db file with SQLite DB Browser. Before you do this, delete the TUs for AC:BF in FSD and reboot Xbox. After you delete the entry in content.db, save and reboot Xbox. Then, re-scan for content in FSD (creates new game entry in content.db).

Clear system cache again, and block/disconnect Xbox from internet.

I have never done a packet analysis to determine if Uplay is able to communicate without Live access, so disable internet (just in case) while trying to start your game.

 

[Beaver_Buffcoat]

You should also use HashCheck to compare the file Data360.forge in the AC:BF folder on your Xbox HDD to a known good copy. If they don't match, replace Data360.forge.