I downloaded DTA from another site and it works fine,it is just not the latest update.What difference is there except sites?norton has never steered me wrong!
Viewing post in Domnate them all on itch.io has a virus in it
norton does make false statements on scans:
Google found out: https://fortune.com/2016/06/29/symantec-norton-vulnerability/
Then racket911 found a easy way to break anti-software: https://www.rack911labs.com/research/exploiting-almost-every-antivirus-software/
So has you can see Norton is not safe and does not protect your computer, the scan was a lie.