Did it just happen once and you came here, or does it happen every single time you reload? This game glitches a LOT, so freezing up during dialog and ingame cutscenes is a common occurance. The game tells you to save often, and it's true, save often, because the combat won't kill you, but the lock ups will.
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Happens every time. Don't know how to get past this point. Kind of sucks big time.