avast! Professional Edition is a complete ICSA certified antivirus software for your company. It obtained VB100% awards in 2002/4 Virus Bulletin comparative reviews. avast! scans: On Demand - with Skinnable Simple Interface, during Boot Time and On Access. It protects E-mail, HTTP, NNTP, ICQ, mIRC, Kazaa etc. It maintains Virus Chest. True incremental updates are small and fast.