Playing Civ4, all the movies (not including wonders, just the start up and victory movies) are jerky and slow, all the other graphics and stuff is fine though. I'm running:

Brand New computer (1 month old)
1GB DDR2 RAM
256MB Nvidea 7300LE
Pentium D 2.66ghz

Any suggestions?

[EDIT]: It's just CivIV straight out of the box.