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DMC Does Not Open

DMC Does Not Open

Overview

This article servers to cover the common reasons we see that the DMC Application itself is unable to run properly on your machine.

Simple Troubleshooting

We recommend trying the following to immediately verify whether this is an environmental issue or not

  1. Review the requirements at Server Requirements (Jump Box)
  2. Ensure you’re running DMC as Administrator
  3. Ensure that the DMC application is “Unblocked” at the bottom of Right Click > Properties
  4. Clear the %temp% folder for the user running DMC
  5. Locate or create a virtual machine that is not domain-joined, attempt to run DMC on that machine
  6. Repeat for anti-virus and other security software

AppLocker/Group Policy

The most common reason we see DMC is unable to run is that it is blocked by Microsoft AppLocker, which is configured in many enterprise environments to block unknown software.

You can confirm this is what is affecting you by doing the following:

  1. Login to the system you’re running DMC from
  2. Attempt to launch DMC as administrator
  3. Open Event Viewer
  4. Navigate to Apps and Services > Microsoft > Windows > AppLocker
  5. Open each of the included logs and check for any recent events
  6. Proceed with whitelisting if events are found

Whitelisting DMC through AppLocker

DMC will execute from 2 locations:

  • The location where DMC is first downloaded, usually %userprofile%\Downloads
  • The user’s %temp% folder where it self extracts

Ideally these locations are temporarily whitelisted on the system that is running DMC.

While our DMC application is signed, some components within are not. Specifically this includes the SQL Scan component made by the Microsoft Corporation, and the 7-Zip package manager.

The DMC self-extractor as well as the DMC executables contained within are signed by Altra Technologies Pty Ltd using the certificate thumbprint below

bc3766b9056d7125bb20a27d47a54913c0c54628
Last Updated: February 2026