After patching (if necessary), the Launcher closes when 'Launch' is clicked but Descent: Underground does not launch.
On Windows machines that newer versions of DirectX installed, certain older DirectX DLL files are not being installed or detected by default that are required by Unreal Engine 4.
We are looking into correcting this automatically during the game install/launch, however in the mean time if you experience the symptom where you click "Launch" and the launcher closes with no error and no game gets launched, please do the following.
Download and install the DirectX End-User Runtime Web Installer
Please note, this is necessary even if you are using a newer version of DirectX.
Please be cautious as Microsoft attempts to bundle 'Bing Toolbar' with this installation. You will have to deselect the toolbar during install of this library if you do not want to install it.
- Run Windows Update
- Reboot Your Computer
Once these steps are complete, please attempt re-launching and you should be able to enjoy the game.
A common adware engine (Lavasoft) actively interferes with the Launcher's ability to open the UI. This product is often used to deploy bundled software included with certain free software products. It is also a part of the anti-adware product ad-aware produced by Lavasoft.
This product does not usually show up in Add/Remove programs and may be completely invisible to the end user. You can verify if you have the problem by looking for the C:\Windows\System32\LavasoftTcpService64.dll that gets installed with the product. NOTE: please do not delete that file manually as it will cause a number of hard to fix issues.
To repair the issue, download adwcleaner (https://malwarebytes.com/adwcleaner/) and run it which will remove the problem and allow the game to launch. Note this is not the core Malwarebytes product but a separate download, the core malwarebytes product does not seem to remove the problem at this time.