It is possible to optimise the game by turning off Physx (if a Nvidia gfx card is installed).
To do this go to the Control Panel (Start on the windows task bar then control panel) and either select NVIDIA Control Panel or Nvidia Physx.

In the NVIDIA control panel go to ‘Set PhysX configuration’ and set PhysX GPU acceleration to ‘Disabled’.

If performance is still poor then turning down the graphics quality in the options menu may help.

To turn down the graphics go to the Options screen
Next to Graphics click on MORE.
Where it says Graphics Detail click on the arrow next to it.