NIS20 and XP: ccsvchst occasionally hangs at shutdown

Using NIS 20.2.0.19, about 1/4 of the time at Windows XP shutdown, ccsvchst.exe will not shut down, and an "End Task" notification pops up.  I then have to use the "end task" button to go ahead and shut down.   I have seen a couple of other threads on this matter, and although there are some suggestions to try (some of which involve editing the registry), it's not clear if a definite cause/solution has become apparent in the meantime.  Like I said, it doesn't happen every time, maybe every fourth or fifth time, kinda unpredictably.   When I upgraded from 2012 to NIS20, i had uninstalled NIS12 and ran NRT twice.

 

Does this continue to be a known issue?  And secondly, is this problem limited strictly to shut-down; i.e., I hope it's not hanging up while the computer is running.  I'm not finding any errors in the history log.  So I assume (or rather I hope) it's just a nuisance and not affecting my protection any.