Does it show the name and path of the infected files?
Not a software is perfect.
Or, in other hand, could be Norton false positive, just trying to ‘force’ you to buy their full version with a false protection sensation…
I won’t do anything without further info (name and path of the files).
But if you want to do something, you can use Norton to clean them… I suppose.
There isn’t an international convention for virus names. It could have a different name on avast.
Or, avast could have missed this one and need to improve its detection.
If you want a ‘second’ opinion you could have free BitDefender installed side by side with avast.
Other antivirus, resident ones, will have problems and conflicts.