Problem with new systems is usually the game wasn't developed when your
system was made, so you could run into problems, You have all the settings
cranked to max? what if you try clicking Default in video options, does the
game smooth out a little?
Onboard video card or did you upgrade to something a little beefier?
What Dale said, respond with your hardware specs or just the model number of
your HP (front center at the bottom, something like "HP Pavilion a1000n" or