nice processor, nice RAM, vid card is the BAD, thats a low end card you have.
make sure its DX9 B which is the latest version....
go to
http://www.nvidia.com/content/drivers/drivers.asp for your drivers....
with the card you have, you should take the late 30' to early 40' vid card drivers....
RIGHT CLICK destop, Properties, Settings, Advanced, GeForce(look in there for the driver version)
but seriously that card will not make things look to good, think about getting a better one, if not, yours will work just fine, but it could be better.