This document provides instructions for upgrading HP ArcSight ESM, ArcSight Express, or ESM Express to version 6.9.1c. It includes prerequisites like verifying proper operation, preparing resources for backup, validating resources, and opening a support ticket. The upgrade process involves running the upgrade utilities package and confirming the upgrade succeeded. Post-upgrade tasks include restoring backups and verifying configurations. Instructions are also provided for upgrading the ArcSight console and connectors.