Security has become more and more to the attention of Microsoft last few months. Yesterday they released version 1.1 of their Antivirus Defense guide on their download section.
Microsoft Solutions for Security: The Antivirus Defense-in-Depth Guide provides an easy to understand overview of the assorted types of malware, their risks, characteristics, means of replication and payloads. The solution also details the considerations for implementing a comprehensive antivirus defense for your network, servers and clients which goes beyond simply installing antivirus software into the related tools which will help reduce your risk of infection. Lastly, the solution provides a comprehensive methodology for quickly and effectively responding to outbreaks or incidents when they occur.
The document is available here. It's in English and weights 608KB.