If the demo doesn't open when you click play, does it mean your computer's not good enough??? Or just somethings wrong?
demo's are sometimes quite buggy, on my pc it ran for about 1 minute then crashed. it could be that as you have onboard rgaphics it just cant run the demo. i definitely recommend far cry anyway, i got it 2 years ago and still play it. just make sure to install the patches
Thinking about it.