it could be a number of things. how much ram do u have i have 4 gig and do not have any problems running any program or game it is better to have more than needed than not enough. 2nd what kind of graffix card do u have i have a ati radion  hd2600 pro i can play almost any game i have over clocked it by 10% it does very good i also run dual screens . so if it is not your ram and is not your grafix card it is prb. your processor. is to low to run the game well i have a dual core e2140 processors that i over clocked even though u are not suposed to with this type of processor. it is at 3.9 gig. so just take a look at your system  to see what u can improve on and see what programs u have running when u are playing games if u need to see what programs are running in the back ground and how to turn them off so they do not eat up your ram or processor go to service double click what u do not understand it will give u in detail what it does and u can pick to turn it off or delay start and so on by turning off the stiff u do not need it will free up ram and processor and also speed up boot and. one good tip if u have your on antivirus program turn off windows defender if u have your own fire wall turn off windows fire wall u do not need them if u have others it will free up a lot of speed and ram. good luck

alright i really dont know that much about computers....... where do i go on the computer to check how much RAM i have.... i have an ATI graphics card but i dont know how powerful it is.  I'm currently using a hp pavilion laptop