I got the Dawnguard and Dragonborn add-ons for my Xbox a few weeks ago. While my Dawnguard worked fine, my Dragonborn only added a few new bits to my game; I couldn't find the cultist or the ship in Windhelm at all.
I re-downloaded Dragonborn and now I can do the Dragonborn quests, but the game keeps freezing on me. And there is a delay in the speech and sound of the game, or the sound doesn't come on at all.
I have tried deleting my saved games and starting again and I still have the same problem. I have checked to make sure my XBox is not overheating. All my other games are fine; it's only Skyrim that has this problem and only since re-downloading Dragonborn. I have also checked to see if the file was corrupt and it doesn't appear to be.
I found other similar problems, but they are all with the game installed on the hard drive, and I only have the add-ons on my hard drive. How can I fix these problems with the Dragonborn add-on?