Hmm, do you mean it crashes to desktop and gives you soem sort of windows error message or do you mean that the red loading bar is full but nothing seems to be happening...
in the first case, could you post your PC specs and any error you might get...
in the second, your impatience got the better of you, if you hadn't seen the "not so long ago...." screen yet, there is no reason to panic, I've noticed that especially when first loading a campaign after the install it may take a very long time to get going, but it does do so, the red loading bar is also not very accurate the first time you load up a campaign..
could you post you PC specs anyway, it'll help us help you