Need help with Penumbra dowload

[Nickool]

OK, so I recently bought the game and it's my first ever computer game. But when I play it, all I see is a white screen once the game starts to play. Now, I don't know much of anything about computers, so I'm completely lost in how to fix this, what download I need, where to go and what to re-install. So any help would be nice.
So far the only things I can tell you about my laptop is, it's only a year old, Acer, Windows 7, Intel i5, and it cost me $600 on sale.