This is a known issue that can occur with older versions of Windows native to the operating system.

The computer is reading the DMX USB PRO as a mouse and interpreting the data it generates as mouse movements and operations. To fix this, try the following:


A classic… This seems simple, but it could help. 

  1. Turn off your computer. 
  2. Plug in your device to the USB port (preferably a different one than you were using before).
  3. Turn your computer back on.

This might resolve your issue. If not you can try solution number 2.

Change Settings of the Port:

There’s a potential your computer has a box checked by default for some reason on the port you are connecting the USB PRO to. 

  1. Open Device Manager.
  2. Expand the "Ports (COM & LPT)" option.
  3. Find the port marked "USB Serial Port (COMX)" as pictured below (the X is a variable). 
  4. Right-click the port, and select the "Properties" option. A new window will appear.
  5. Select the "Port Settings" tab shown in blue below.
  6. Click on the "Advanced..." option highlighted in green above. A window will appear shown below.Graphical user interface, text, application 
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  7.  The option "Serial Enumerator" needs to be toggled off. To do this, uncheck the checkbox for it.
  8. Restart your computer to finalize and check all runs as intended..

For more information, refer to the FTDI Advanced Options PDF here.