https://bugs.winehq.org/show_bug.cgi?id=56871
--- Comment #3 from mushu csumushu@126.com --- (In reply to Rafał Mużyło from comment #2)
Can't say anything about the actual issue, but the dirs are correct, on 64bits syswow64 is for 32bit libs.
However, it is a bit strange that the disappearance of the wpcap.dll in the system32 directory would affect the operation of 64-bit programs.