How come games that were made in late 2007 lag on your PC

Probably the main reason is that either your processor is bad, or your graphics card isn't strong enough. Either one can lag a game pretty bad. Especially when you're playing online. If both your processor is good, and graphics card is good, it may be because you might have something else running on your desktop. If not, then you might want to check your computer for any damage in it. Check the system requirements of the game against the components in your computer