Steam version freezing

[THIS POST MAY CONTAIN SPOILERS]

Hey everyone, I finally got round to getting Puzzle Agent as part of the indie bundle on steam but I'm having a problem.

After doing the second snowmobile puzzle to follow Glori Davner to the factory, halfway through the cutscene where Nelson is ambushed by the gnomes, it freezes. Right around the time Nelson is screaming. I was wondering if anyone had any ideas how to get round this? I'm really enjoying the game so far, I haven't even touched anything else in the bundle yet, and I really want to keep playing it.
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