Some approximate report of what was I doing while two Error:3048,3 Autofix dialogs appeared:
Tonight while on AOL main site and viewing one of their headline videos, this Autofix Error dialog appeared. I waited while Autofix looked for a remedy online; then no fix was found and I was given a button to "open support web site".
A few days ago, within about 2 hours after installing and activating NIS 20.1.1.2 on same computer, was the first occurance of Norton Autofix Error:3048,3. I was also viewing a video on the AOL site at that time.
Dialog:
Norton Autofix
X Attention
We are unable to find an automated fix for this issue. Please go to our support website for further assistance.
button caption : Open Support Web Site
I chose "close" instead.
EDIT: I used Comodo Dragon v21.2 on tonights event, and I believe but not certain that I also used Firefox v15 a few days ago event.