Legacy Update: Get back online, activate, and install updates on your legacy Windows PC

DCDiag is command-line tool which analyzes the state of domain controllers in a forest or enterprise and reports any problems to assist in troubleshooting. As an end-user reporting program, DCDiag encapsulates detailed knowledge of how to identify abnormal behavior in the system.

Files

Status: Deleted This download is no longer available on microsoft.com. The downloads below are archives provided by the Internet Archive Wayback Machine from the Microsoft Download Center prior to April 2023.

Files
dcdiag_setup.exe SHA1: 2db19386a4e9c17061d0d0bba8d84dd3a04a8060 Size: 242 KB

File sizes and hashes are retrieved from the Wayback Machine’s indexes. They may not match the latest versions of files hosted on Microsoft servers.

You can download and use Sonar.exe on any of the following platforms:

Windows 2000 Professional
Windows 2000 Server
Windows 2000 Advanced Server
Windows 2000 Datacenter
Windows XP Professional

1. Click the link, DcDiag_setup.exe.
2. In the File Download dialog box, select Save this program to disk.
3. Select a location on your computer to save the file, and then click Save.
4. In Windows Explorer, go to the location where you saved the downloaded file, double-click the file to start the installation process, and then follow the instructions.
The downloaded file is a self-extracting executable (.exe) file. By running the file, you install the tool and documentation on your computer.

When you install a tool, you are prompted to choose an install directory. If the Windows 2000 Resource Kit is installed, install the tool in the Resource Kit directory to avoid an overly large system path and to ensure more reliable upgrades. When you install the Resource Kit, the recommended directory is C:\Program Files\Resource Kit.