I have this problem where I try to enter certain areas during the Dawnguard quests. I play Skyrim Legendary Edition on Xbox 360.

The last problem I had was trying to enter Dimhollow Cavern. It would try to load that area, but then freeze the game resulting in me simply having to turn my machine off. I did everything I could think of to fix this problem including: reloading to an older save file, deleting old saves, clearing the machine's cache, restarting the game completely with a fresh character, and even taking off all of my gear before entering but it just freezes.

This happened once before but well after Dimhollow Crypt/Cavern. My attempts to enter Volkihar Ruins with a completely seperate character was the first time this problem occurred. I have no idea why any of this is happening, and trying to find an answer has yielded no results. I even joined this forum to get help. I have only had this problem during a Dawnguard specific quest. I can play for hours doing literally anything else but when I encounter places where it needs to load an area on one of these quests it sometimes refuses to work and when this problem is encountered it roadblocks my entire game. I deleted all of my old game saves for the sake of fixing this, started a brand new game and rushed to do the Dawnguard quests but Dimhollow Cavern crashes anyway.

Please help!

*UPDATE*

I went in and deleted Skyrim from the HDD. Still no progress. The loading screen features no text, or a random item to observe just mist. I even turned the music back on and that cut out completely. Everything freezes, I can't just unplug my controller and have a prompt for me to plug it back in pop up. It is a complete system crash, I cannot use the Xbox button to navigate anything.