Call of duty / fps games

[Skull and Bones]

BF3 is quirte slow and how we can work on its mouse sensitivity..

I am playing on my laptop machine [Core i3, 2GB Graphic Card, 4 GB memory]......but still game is slow and mosue sensitivity is a big problem


Someone please suggest me to sort out with this problem

I never faced any any slowing issues as such, even i play most of these games on my laptop. [Core i7, 2 GB Nvidia GT 450, 6GB RAM]