That image is exactly what I see when I go to the File/Help section in Word. The popup is pretty random; it doesn't seem to be associated with having Word running but it may be that something from Office has to be running. Hard to tell, since I always
have at least one Office app (like Outlook) running. The repair you suggested seems to be benign so I will give it a try. Unless it's immediately evident that it hasn't helped, I'll wait a week or two before I report success. Again, thanks for your help,
Doug, and your patience.