Hello,
after doing some search upon the start issues for OSK.EXE I found several threads covering the nice 32bit/64bit filesystem redirection.
Searching the autoit help is bringing up this topic:
_WinAPI_Wow64EnableWow64FsRedirection
That one is telling:
This function is useful for 32-bit applications that want to gain access to the native system32 directory.
By default, WOW64 file system redirection is enabled.
This function may not work