The issue might be caused by a problem with the outdated version of QIDI Studio, preventing it from exiting properly. A straightforward solution would be to restart your computer and proceed with the installation.
In this case, the primary issue seems to be related to QIDISource.dll. This DLL is registered as a playback plugin for the Windows Media Player system, which means it can be loaded by other media playback software. To resolve this, you can locate the modified DLL and manually delete it.
If the deletion of the DLL fails, it suggests that some software is currently utilizing it. In such cases, restarting your computer may resolve the issue. However, if there are software programs set to launch with the system, the problem may persist. To proceed with the installation of QIDI Studio, you will need to manually stop the relevant software before continuing.
If you encounter any other issues during the application installation. Please contact our customer service promptly, and they will provide you with personalized assistance.