Assassin's Creed III + Update + DLC - 3xDVD5 *CIU*

[pakrat2k2]

the error is because of this line

#define ProductCode "{E3B9C5A9-BD7A-4B56-B754-FAEA7DD6FA88}"

its the same in your Hitman, FC3, and this topic installer code.

Remove whats there go upto tools, generate GUID, will generate NEW guid for the game. ( needs to be different for every game ) thats why the uninstaller has FC3 rather then AC3.