I never lag at all. If you lag allot you might wanna clean your computer. As in do system restore, It will take your computer to the day you got it and it will be very noticeable how the game wont lag.
To do system restore all you have to do is, When you turn oh your computer keep pressing F10 Intel a screen will come up press start system restore and click (next ->) then advanced options and next then start system restore.
Thank me if i helped and your computer will be much faster.