> > I uninstalled 'Tabbles' (which had context-menu entries), and now
> > ZSHELL64.EXE is closing properly.
> >
> > ( Tabbles free version is no longer being developed. )
> >
> > The program that helped was 'MultiMon' -
> > http://www.resplendence.com/multimon
>
>
> What gave away that Tables was the culprit on your machine?
MultiMon show an unusually large number of "connection" between Tabbles.exe and ZSHELL64.EXE. So I decided to uninstall Tabbles to see if that helped. Then the uninstaller complained that ZSHELL64.EXE was preventing it from working, so I closed all of the ZSHELL64 instances to allow the uninstaller to run. Subsequently, ZSHELL64 closes normally, about six seconds after dismissing the context menu.
Thanks to MultiMon, and your suggestion that a "shell menu extension" might be the problem.
Bill