Well, I've narrowed down the possibilities. I did the following:
1. I check the Go Back history and "safe points." It gave a list going back 14 hours.
2. In Norton's SW, I did the "Clean Sweep"
3. Checked Go Back again, same list.
4. Did the leftovers to clean in CCleaner.
5. Checked the Go Back again, same list going back to 14 hrs. prior safe points.
6. Did this for several days.....always had a list of safe points.
7. Last night, I did a defrag after the cleaning. Checked Go Back again, no safe p