Thanks for adding your thoughts. A couple things i want to clarify...i only had to add the value name in right pane, and the issues dont become acute untl after 5 to 10 boots after installation. What is happening apparently is that windows in trying to optimize boot order, keeps changing things around. Avast boot order never settles down when defender is enabled. Never had this issue with windows 7, and never zeroed in on it till i had been running win 10 for a few months, although the errors would happen, i ignored them.