I am also having this problem, norton flashes that it has found the trojan dropper virus while I am connected to the web. But when I scan the system its says no virus was found. I have tried using search & destoy, that finds nothing. It is then ok for a couple of days and then norton again flashes it has found the virus. I have zone alarm on but I still keep getting this measage. I have been to nortons website and tried the removal method they suggest but with no luck. Does anyone have any ideas.