http://bugs.winehq.org/show_bug.cgi?id=35458
--- Comment #2 from Vincent Povirk madewokherd@gmail.com --- The 32-bit version (which will only install in a 32-bit prefix), does not have this problem and seems to be able to find that registry key. I have no way of knowing if this is a Wine bug specific to win64 or to something that only the 64-bit itunes installer does.