I thought the case closed. I went to my Linksys router web site and clicked on the Wireless tab. It began to rescan, and during the process all devices were enabled. The scan seems hung at 99%, however, and if I close that site, the wireless devices are no longer enabled. The box on the screen from the Linksys wireless tab says
"Searching for your client device.
If you haven't clicked on the Wi-Fi Protected Setup button on your client device, please do so now." The bar below has remained at 99% for some 15 minutes. I can return to the main page for the router only by opening a new connection. (The browser back button on the original scan page shows "document no longer available") As soon as I go to the Wireless tab, the scan resumes at the 99% state and the wireless devices are again enabled. I seem to be stuck!
Just read your reply, ubunturles. I will try this.