A problem with lag might signal that your graphics card is not supported. Go to this link and select Sims 2 from the drop-down menu to see if your PC meets the requirements: http://www.srtest.com/referrer/srtest Other games might run fine but The Sims 2 has fairly high DirectX requirements and you must also have a 3d card that supports the minimum levels of DirectX 9.0 acceleration/features used by the game.