Oh yes, both restore point and system image made before starting.

Explorer.exe still churning away. One thing that I noticed in clean boot was that some things are running even after being turned off in start up, e.g., Fences, the desktop icon organizer. I'll have to use autoruns, which I do have (and use). At bottom, the apparent problem, given my other thread about the problems getting from 1511 to 1607, is that something(s) I use conflicts with 1607. Thanks,