I worked with a norton support person for about an hour last night. I finally disovered a new program in my task pane called slimware. I had not installed it. Once this program was deleted. things returned to normal. It took two deletions to totally remove the program. It was installed on my computer on 8/30/16. This is when I started having problems. I kept getting a pop-up that said that I needed to update 12 program drivers, etc. Each was listed. I recall that the first one referred to a "chipset". How this helps someone.