Preface This guide begins with a brief discussion of the Anti-Virus Information Exchange Network (AVIEN) and its sibling the Anti-Virus Information and Early Warning System (AVIEWS). AVIEN members include some of the most knowledgeable systems administrators, security managers, and independent researchers around, representing the best-protected large organizations in the world, and employing millions of users. All AVIEN members are also members of AVIEWS, which also includes representa- tives of most of the major security vendors and specialist researchers in the antimalware arena.This guide is thus a unique collaboration between the security vendors and