THANK YOU, MARK!!!!
I downloaded and installed the update earlier this evening. I often don't let it restart the computer right away, as I'm usually busy with other things. Tonight a storm was starting, so I shut it down. When I turned it back on, I couldn't get connected.
I spent at least an hour on the phone with Verizon support, and she had me try all sorts of things and finally determined that it was the Zone Alarm, and apparently there had been other instances of that today. So, she gave me a number for Zone Alarm, and I figured there would probably be a charge for their support.
Meanwhile, tonight, I was taking a chance at using the Internet, and every time I reached a place where I'd be on the same page for a while, I'd turn the Zone Alarm back on, hoping that the short times that it was off in between wouldn't be dangerous!!
That turned out to be quite fortunate, as I found your post, did the restore, and ALL'S WELL!!!
I think I'll contact Verizon and let them know it's the Windows Update.