This document introduces Windows XP Professional by describing its architecture, user interface features, hardware support, security technologies, and role in enterprise networks. It is based on the Windows NT kernel and includes an intelligent user interface with Start menu, Taskbar and Desktop. It provides enhanced device driver support, CD/DVD recording, and network autoconfiguration. Security features include Windows Firewall, Security Center, Encrypting File System, and policy-based management. Windows XP can be used in workgroup or domain networks.