Hello,
last night I had much work with lost folder credentials in the public folder tree.
I turned to a previous restoration point and my Norton Anti-Virus crashed,
but the credentials were restaurated.
First I activated Windows Defender updated the signatures, but a quick check brought no vulnerables.
Then I started Norton Power Eraser npe.exe but it freezed in finish of execution.
To reinstall Norton Security I had to login in Norton site,
download the Norton Remove and Reinstall tool NRnR.exe.
With NRnR.exe I was only able to uninstall Norton Security.
Then I had to remove my marked installation in https://manage.norton.com/Manage
After I was able to download and install Norton Security again.
Before reboot, at first I updated the virus signatures and for save I created a new Windows restoration point.
Turned off the net connection, rebooted and run a full system check with Norton Antivirus, which found some vulnerables, but not so criticals.
I rebooted, plugged in the network connector and started Norton Power Eraser npe.exe
Critical vulnerables were found! Some files with "Heur.AdvML.B" and one with "Downloader".
I hope the problems are eliminated.
I wish easier days
Erhard