trouble in star wars battlefront 2

[BurtunGuster]

So I downloaded SWB2 recently and I am having a few difficulties with the game. It runs most the instant actions fine ,but the galactic conquest, campaign ,and some instant action start loading and then crash to the desktop. I have tried plunging in a headphone jack, going to the recording tab in control panel,and installing realtek audio(which I am having problems installing too!).

I have a Dell Dimension C521 running win.8.1.

Any help would be appreciated!