Welcome to the forum. 
The biggest boost for you would be to update the amount of ram on your system.
Ram is also quite inexpensive. You currently only have 1 Gig and part of that is used for your graphics.
Adding an additional 2 gig of ram would make you think you’ve just inherited a new computer. 
You could try the following and see if it makes any difference:
http://www.screencast-o-matic.com/screenshots/u/Lh/1391449719860-6871.png
Reboot your system and see if you notice any difference. (You should still increase the amount of Ram to notice an increase in overall
performance.)