A message box pops up a split second before shutdown completes. it's too fast to see the content. Event Viewer shows nothing unusual. Is there some other kind of log, or some way to stop shutdown, so I can read the message, or is there some kind of turn-on/turn-off trace function, or something that records and plays back a sequence? This just started happening in the past week. The only changes I can think of is (re-)installing MS Word.