Game crashes: questions and answers.

Heroes 5 keeps crashing with an error when I collect gold, artifacts, and sometimes during battles. I believe the cause is an error during the game installation. The sound.pak file wasn't installed correctly; it's 677 MB in size. Does anyone know if this is causing the game to crash (e.g., when you collect gold, there should be a sound, but there isn't, and that triggers an error)? I downloaded Heroes from a torrent (a good pirated version) and haven't been able to finish downloading the image for 3 days; it's stuck at 99.8%, so I installed it this way. Maybe someone can share their sound.pak file?