disc

I've had this problem for a month. Whenever I finish Gravemind, instead of going to Uprising, the game either crashes for gives this error: "Sorry. Please Insert Original Halo 2 Game Disc." I've tried to do so much. I've deleted, then reinstalled. I've contacted General Heed and his suggestions...

I bought Halo 2 Vista and downloaded Project Cartographer. However, my computer broke and my new computer doesn't use discs. How do I get my game back?

Hi, I just installed the game today and started the campaign. I got as far as the 3rd checkpoint in the first mission but then got a message asking to insert the game disc. It will not let me continue from the checkpoint either, giving the same message.