CWPQ crash

Here are some things to try:
--Play in Windows mode.
--Change your graphics during Stage 5 at least once. You may reset your graphics quality setting afterwards.
--Check to see if you can copy your .wz files to another location (or copy to NUL if you know how to do that). If you can't do this, you may be dealing with corrupt files. (I discovered my Character.wz fails the CRC, and thus corrupt, for six items for some reason)

This may be off topic, but it may be relevant to him aswell. Personally, whenever I play in window mode, as soon as I try to change anything in system option for MapleStory, when I click ok the screen freezes. I have to close the game and restart it.