Probs with Total War

I can't get the campaign part of Medieval: Total War to run. It either crashes or returns me to the options.

I've already reset the video resolution and double checked the system requirements. Any suggestions?

Maybe you have the wrong disk in? I think I had a problem like that with Shogun: Total War.

have you downloaded patches?

I had those porblems only with Shogun and only on extremely old equipment. Prolly hardware messed up.