This document provides release notes for ArcSight ESM version 6.9.1c Patch 1. The patch updates the JRE to version 1.7.0_97, enables HA on new certified OS versions, addresses critical issues in 6.9.1c, and provides security and vulnerability updates. The document describes how to install the patch for the ESM suite and ArcSight Console, verifies the downloaded software, and lists fixed and open issues.