game not working please help me?

Hey i am trying to play Penumbra Overture Ep 1 and it crashes like literally every fifteen minutes. At the beginning I didn't really care and I got as far as I could go in between crashes, but at one point I have to turn a generator on and it turns all these lights on and every time I turn the generator on the game crashes. I know it won't go further than that.

I know there's a lot of trouble with the graphics in this game, but I did set everything to it's lowest. Don't ask me about my graphic card, I really don't know. I'm playing it on a Compaq Presario laptop though, if that helps. I have the latest version of OpenAL and I downloaded the Penumbra 1.1 patch, so it's not that. It literally tells me every fifteen minutes or so: Penumbra.exe has encountered a problem and must close. Do you wish to send an error report?

This sucks, it's an interesting game I want to play it lol, can someone please help me? Thanks!