Hello,
Even it's crappy lappy just upgrade you RAM if you have 2gb RAM make it 4 or 8, Did you know that a System Unit/Laptop is not based on their processor it needs a better Random Access Memory also you need a good Graphic Card like ATI Radeon or Something else. For now I can give you a few solution to reduce your lag in game, Update your Drivers
with this, if you want to have a better gaming you can also
use this. And for those unused file or extension you can remove it by using
this.