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I have Norton Internet Security installed in my computer for years. Live Update is run daily, Quick Scan every 2-3 days, and Full System Scan once or twice a month. How come my computer is still infected with Trojan.Gen.2 (knowing it only after a Full System Scan because Quick Scan didn't detect it) ??? Then the removal... as suggested, I run Norton Power Eraser. After that, Full System Scan again. But the 6 Trojans are still there. What should I do?