I have Norton Internet Security 2009 and ThreatFire installed.
On Friday, I had noticed a pop up message which I believe was from Norton. It is at the place that a background scan message come up and down. At first I wasn't paying attention to the message, so I was only able read the word Trojan before it fade away. And there was a word after the Trojan but I couldn't catch it.
At the time I was just plug in my usb drive. After I saw the message, I did manual scan to both my usb drive and my hard drive, and it found nothing. I tried to look at the Full History log. I couldn't found any message about finding a Trojan virus.
I also tried to scan using ThreatFire, AVG, and BitDefender online version and they all found nothing.
My questions are, anyone has similar experience and know what that message may that be? Should I be concern? What else I can do to make sure my computer is clean?
Thank you very much.
[edit: Changed subject to reflect issue.]