Last couple of days have been harrowing. I have had things fixed now but not exactly to my satisfaction. Mozilla froze (almost) because of Norton. I uninstalled it, also uninstalled Norton and downloaded Avira. But download wasn't successful, presumably because whatever caused Mozilla to freeze continued to be an obstruction despite the removal of Mozilla & Norton. Then I had to uninstall Avira and needed to call the technician to detect the obstruction. He said he would need to reinstall the OS which he did. Unfortunately he's too great a fan of Norton and scared me as best as he could that Avira would work well for a year and then make my computer slow. So for the time being I said ok to reinstall Norton though he didn't charge me again for the av. Let's see how long Norton takes to get overly controlling.
The problem now is with configuration concerning browsers which I'll put up separately.