The Antivirus Defense-in-Depth Guide

The Antivirus Defense-in-Depth Guide provides an overview of the types of malware and their risks, planning an effective antivirus strategy for your organization, and responding quickly and effectively to infections or incidents when they occur.

http://www.microsoft.com/downloads/details.aspx?FamilyId=F24A8CE3-63A4-45A1-97B6-3FEF52F63ABB&displaylang=en

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Windows Server 2003 Security Guide

The Windows Server 2003 Security Guide focuses on providing a set of easy to understand guidance, tools, and templates to help secure Windows Server 2003 in many environments. While the product is extremely secure from the default installation, there are a number of security options that can be further configured based on specific requirements. This guidance not only provides recommendations, but also the background information on the risk that the setting is used to mitigate as well as the impact to an environment when the option is configured

http://www.microsoft.com/downloads/details.aspx?FamilyID=8a2643c1-0685-4d89-b655-521ea6c7b4db&displaylang=en

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Windows XP Security Guide v2 - updated for Service Pack 2

The Microsoft Windows XP Security Guide provides several levels of security guidance for customers interested in hardening deployments of Windows XP for desktop and laptop clients in their environment.

http://go.microsoft.com/fwlink/?linkid=14840

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Threats and Countermeasures Guide

The purpose of this guide is to provide a reference to many of the security settings available in the current versions of the Microsoft® Windows® operating systems.

http://www.microsoft.com/technet/security/topics/hardsys/tcg/tcgch00.mspx

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Using Microsoft Windows IPSec to Help Secure an Internal Corporate Network Server

Describes how to configure Microsoft® Windows® 2000 IPSec and Windows XP IPSec to help secure an internal network server against network-based attacks from untrusted computers. IPSec enhancements in Windows 2000 service packs and in the Microsoft® Windows Server™ 2003 family are also described

http://www.microsoft.com/downloads/details.aspx?FamilyID=a774012a-ac25-4a1d-8851-b7a09e3f1dc9&displaylang=en