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.
- Turn off your computer.
- Plug in your device to the USB port (preferably a different one than you were using before).
- 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.
- Open Device Manager.
- Expand the "Ports (COM & LPT)" option.
- Find the port marked "USB Serial Port (COMX)" as pictured below (the X is a variable).
- Right-click the port, and select the "Properties" option. A new window will appear.
- Select the "Port Settings" tab shown in blue below.
- Click on the "Advanced..." option highlighted in green above. A window will appear shown below.
- The option "Serial Enumerator" needs to be toggled off. To do this, uncheck the checkbox for it.
- Restart your computer to finalize and check all runs as intended..
For more information, refer to the FTDI Advanced Options PDF here.