In the first 3 weeks of March 2019, I could see all my networked computers. All of sudden, at the end of March 2019, I can no longer see them. Actually I had been accessing a file on another network computer, closed the file; then wanted to access a different file on that computer --- and in file explores "the other network computer (that I had just access)" had disappeared.
I checked all the different "services" (as previously been reported on the internet that should be "Automatic" and running) and they were running on both computers.
So now, what has to be done to see my networked computers?