Internal drive with short filepath. All the files are without read only. For the last point, i don't get it. For what regards the last note, yes, i know and already do in that way.1) What are you running this on?
2) Internal or external drive?
3) short, medium or long filepath? (number of clicks/folders)
3.a) filepath length? (number of characters)
3.b) Foreign characters in filepath?
4) make sure nothing is set to read only (unless necessary).
5) any RTP/requirements? could be issues with their extraction/installation.
as a side note, Japanese Locale is usually needed for downloading, extracting and installing... and in some case, running the game as well.