My team has made edits / updates to some of our guides:

Security Risk Management Guide v1.2 March 16, 2006
http://www.microsoft.com/technet/security/topics/complianceandpolicies/secrisk/default.mspx


The Microsoft Windows NT 4.0 and Windows 98 Threat Mitigation Guide v1.1 March 30, 2006.
http://www.microsoft.com/technet/security/topics/networksecurity/threatmi.mspx


Windows XP Security Guide v2.2 April 10, 2006.
http://www.microsoft.com/technet/security/prodtech/windowsxp/secwinxp/default.mspx


Windows Sever 2003 Security Guide v2.1 April 26, 2006.
http://www.microsoft.com/technet/security/prodtech/windowsserver2003/w2003hg/sgch00.mspx