I recently bought this game. After putting in a good 60 hours of game play the game began to lag allowing for loading of terrain and what not. Today inventories began to take 30+ seconds to load while areas and loaded games would take minutes to load. I decided to try to install the game onto my xbox (slim). Upon trying to install the game my xbox is unable to read the unscratched, almost new disc. i tried deleting the system and game caches but this has only made the problem worse. I am now unable to load the game (it sits at the load screen for 20+ minutes) at all, play it, install it, or enjoy it. Mind you ive had the game for about a week and all of my other games load and play just fine. Is this a disc error? hardware issue? Any solution would be appreciated.

Its possible its a disc issue, do any other games behave the same way? If they dont its probably the disc. If other games have any similar problems then its likely a console hardware fault.