I have 8 gb ram on my laptop (where I play it), and I don't know where to check the other stuff

Hello, first off, I love the game, more than I thought I would (Won it randomly, would never have bought it otherwise)...
Now, when the first part is done.... I have a question... Why do my game FREQUENTLY, like every 5th minute or so, crash? I mean full fledged crash which gives me an error and ...