I have a trouble that I recive many many mails every day.I know it's due to a virus called "swen".I am sure there is no virus on my pc.On my mail server the virus was found by Symantec antiverus.But I can't hold it ,now I still receive the virus mail every day!I had used many virus removal tool , it is useless!

MY mail server configuration
windows 2000 server(sp3+IE6)+exchange server 2000+ trend scanmail for exchange+symantec server8.0

what should I do? Help me! thand u in advance!