This document provides an administrator's guide for using Microsoft Diagnostics and Recovery Toolset (DaRT) 8.0. DaRT 8.0 allows administrators to diagnose and repair computers that will not start properly or that are experiencing issues. It includes tools to recover unusable computers, diagnose problems, repair unbootable systems, restore lost files, and detect malware. The guide covers planning, deploying, operating and troubleshooting DaRT 8.0, including how to create and deploy the DaRT recovery image to recover local or remote computers.