This publication assists IT professionals in securing Windows XP workstations, mobile computers, and computers used by telecommuters within various environments. The recommendations are specificallyintended for Windows XP Professional systems running Service Pack 2 or 3. SP 800-68 Revision 1 provides detailed information about the security features of Windows XP and security configuration guidelines. Thepublication recommends and explains tested, secure settings with the objective of simplifying the administrative burden of improving the securityof Windows XP systems in five types of environments: small office/home office, enterprise, specialized security-limited functionality, legacy, and Federal Desktop Core Configuration (FDCC).