This guide provides detailed information about the security of Windows XP, security configuration guidelines for popular applications, and security configuration guidelines for the Windows XP operating system. The guide documents the methods that system administrators can use to implement each security setting recommended. The principal goal of the document is to recommend and explain tested, secure settings for Windows XP workstations with the objective of simplifying the administrative burden of improving the security of Windows XP systems in five types of environments: SOHO, enterprise, and three custom environments, specialized security-limited functionality, legacy, and Federal Desktop Core Configuration (FDCC).