Here are our current recommendations for virus-related tools. Such tools can be divided into three classes: those that prevent infections, those that warn you when an infection is present, and those that remove infection. This message only discusses non-commercial software. 1. Prevention Two excellent tools for prevention of viral infections are the Disinfectant extension (distributed as part of the Disinfectant application) and the Gatekeeper package. The Disinfectant extension is very easy to install and requires no user configuration. However, it is important to stay up-to-date with this tool, because it only recognizes viruses it has been taught about. Gatekeeper is an effective virus-prevention method for the more technically inclined. It requires some customization to work well in a particular environment. The benefit of Gatekeeper is that it provides some protection against some possible kinds of future virus, not just those that are known today. 2. Detection The most complete and reliable tool is Disinfectant, combined with the Disinfectant extension. 3. Removal There is no question here: Disinfectant is the big winner. It can handle many situations that even commercial programs such as Virex cannot, such as files with multiple infections. The Info-Mac Moderators info-mac-request@sumex-aim.stanford.edu