Why so little information

I just ran a scan and NIS quarantined some stuff. It gives me a list what it found. But it doesn't tell me where it found it. So how can I know what to do unless I know where it found the problems. How can I determine if I want to take it out of quarantine. How can I tell if it came from a source I trust. These are things users need to know. Why has Norton become the opposite of what the Norton name used to stand for.