heres my dxdiag
hi ive just look though you attachment and you have 1000+ paging file space and your only useing 280+ you should knock that up to what windows recommends you computer may run smother. ok go to control panal > system > advanced > then under performence click settings > then click the advanced tab on the top > then at the bottem under virtual memory click change and change it to what windows recommends.
ive JUST bought a nvidia GeForce 6200 (£65 ) and its great. it runs off a agp slot witch you might have.
if you give me your computer specs i should be able to find out if you have an agp slot on your MB.