ok why would broken crescent 2.02 work for a year fine and then all of a sudden decide to CTD when i try to load a campaign..?? im lost..

it says 'medieval 2 total war has ecountered a unspecified error'

im running windows 7..

if you need more info, just ask..
im not sure what you guys would need to help me.. if it cant be fixed i dont mind doing a clean install honestly.. but if its an ez fix, then why not (: