The document provides installation instructions for HP ArcSight ESM Express. It describes the components of ESM Express including the ArcSight Manager, CORR-Engine, ArcSight Command Center, ArcSight Console, and SmartConnectors. It then discusses starting the ESM Express appliance for the first time which involves using the configuration wizard to set passwords, hostname, and network configuration. The document also covers post-installation considerations like localizing reports and installing the ArcSight Console.