It says you have 120 MB of video ram,well dedicated and the rest is shared!
I have to ask what maximum texture size are you using,I dont think hirez will work on your system because of the lowend vidcard. If you are using 512 texture size,you will need to reduce that to 256,may not look pretty but it should help the frame rate!
You might want to set AA in videocard settings to application controlled and then turn the AA off in game,move slider to left all the ways.
You CPU is pretty old being a duocore but it runs pretty fast so I would reduce all the unnessary background processes to free up that shared ram some and reduce cpu load.
Pretty much all I have,this is really above my paygrade stuff but it you do what I said I think you;ll see some improvements! I'm pretty sure the new minimum requirements state you need 256 MB of ram,your card only has half that!
![salute :salute](http://bbs.hitechcreations.com/smf/Smileys/default/salute.gif)
PS: Or since you have seemed to have solved the problem just ignore my nonsense....
![ROFL! :rofl](http://bbs.hitechcreations.com/smf/Smileys/default/rofl.gif)