[Bug 18958] Adobe Reader 9 has a divide by zero error during install

http://bugs.winehq.org/show_bug.cgi?id=18958

--- Comment #12 from Hans Leidekker   2010-08-18 13:24:29 ---
> I could not verify your assertion that the custom action noted is
> DefragmentFiles. How do you know the custom action is called DefragmentFiles
> and where may I find more information about it?

Generate a +tid,+seh,+relay,+msi trace and find the exception. Take note
of the thread id. Then search for the first line generated from that
thread. Just above that is where msi creates the thread to run the
custom action and logs the custom action name.

DefragmentFiles is a custom action written by Adobe, not a standard
action, so it's probably not documented anywhere.