Trojan Horse Virus

Anti-virus internet security software isn´t very good at detecting Trojan horse programs, so for the sake of your information security be extremely careful about opening binary files and Word/Excel documents from unknown or ´dubious´ sources. This includes posts in binary newsgroups, downloads from web/ftp sites that aren´t well-known or don´t have a good reputation, and executable files unexpectedly received as attachments to E-mail or during an on-line chat session.