https://bugs.winehq.org/show_bug.cgi?id=39139
--- Comment #2 from Alex Henrie alexhenrie24@gmail.com --- Created attachment 52158 --> https://bugs.winehq.org/attachment.cgi?id=52158 trace+process
WINEDEBUG=trace+process produces more interesting results.
By the way, DelUS.bat writes "Sharing violation." to stderr over and over.