Halo 4 Campaign Loading Error

I dont know if this topic has already been solved so if there is one please let me know.

My problem is this. I have played Halo 4 campaign, Spartan Ops and Matchmaking without any problem since its lauch date until today. This GT is new, so i decided to unlock achievements from all my games. With my old gamertag, once I passed Halo 4 campaign in legendary, I focused only on Multiplayer and never played campaign again, not even for the campaign challenges.

Now that I want to play the campaign, I cant! It just simply plays the prologue and then it kicks me to the main screen. I’ve tried selecting manually the first mission, Dawn, but it shows me a message telling me that I may be missing downloadable content and as far as I know, I have all updates and I have disc 2 installed in my HDD. I’ve tried to install disc 1 on my HDD but it only reaches 45% and the it tells me the disc is unreadable, that I should clean it. My disc is completly clean and scratch free. I’ve tried to install it 10 times and I’ve failed in every one of them.

I have a standard edition and I never had a problem like this since I started playing on its lauch date U__U I’m very dissapointed and I need help.

What should I do? I doubt that at this point where I bought the game would like to change my disc. Do I need to download something? I’m very desperate now. Please, Help me. BTW this is my first post I make.

I had the same problem as you did. On my standard edition disc I tried to complete the campaign on legendary and I got up to the fifth mission, Reclaimer. My game wouldn’t load this mission and I even tried installing the disc just like you. My disc was scratched so when I got the GOTY everything worked fine. You don’t need to download anything, it’s just the disc.