The sims 2 and my laptop don't seem to be ...

I bought this blue gateway after being reasurred by Best Buy represenitives that this laptop would be more than powerful enough to run the sims 2. however, i installed the sims 2 and all of my expansion packs and found that the game simply will not run without crashing. To help solve the problem, I uninstalled all the sims 2 games and then tried to reinstall the sims 2 on my laptop, but instead of it going smoothly i recieved the saddest excuse for an error message: a dialog box displaing 'the sims 2' and an x mark beneath it.

I went to a website [Can You Run It?] and was dissapointed to see that my computer met all the requirements for the sims 2 to run smoothly! and yet it doesn't. I am very distressed now.