Bob: I think I'm going to have to buy a new computer, for this.... what's your name again?
Doug: I hate it when that happens.
Your computer must at least match the "system requirements" in order to run the software or hardware.
128Mb GPU memory :-(
.. and something you haven't got! >:-/
A game will never work if you only meet these requirements. To avoid shit-heavy lag, surpass them like crazy.
Do some fecking research before you buy a game to see what you really need.