Skipping Dialogues

[OneLeggedDruid]

Hi. I really really hope you can help me with this. I downloaded Amnesia: A Machine for Pigs an hour ago, I started playing, and everything was fine. After a few minutes, I decided to rename my ingame profile. There wasn't such an option so, considering that I had only been playing for a few minutes, I decided to delete that one and create another.
The sound was buggy, in this second (and in the third) playthrough. Even from the start, the opening cutscene wasn't snyched. I could hear the "clicks" of the lights going on way before it actually happened.
And after, when Oswald would say something, I'd only hear a few lines of his whole speech. I noticed this because the subtitles appeared for a second, then disappeared, and then Oswald would skip to the next line.
Considering that the story is 90% of this game, I really can't play it like this. Advices?