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There is a problem with the new installer I think.
Every time that I would play the game, it does not start.
I tried with the "Wizardry 8 fix" that I downloaded here, but it does not see the game. (It sais, the game is not installed.)

Fortunatelly, I have the old setup file, the, it works well.

I have Windows 7, 64bit. I don't know that this is the Windows's fault or my ATI card, but this problem is since then when GoG upgraded the installer, or maybe a windows update caused this. I don't know.