USB-232 Not Recognised by PC After Windows 10 Update

Updated Dec 1, 2020

Reported In


  • USB-232


  • Measurement & Automation Explorer (MAX)


  • NI-Serial

Issue Details

After updating our PCs to Windows 10, version 1909, the PC does not recognise the USB-232/4. It is unable to see the USB-232/4 in NI MAX (Measurement & Automation Explorer) or in Windows Device Manager, and no LEDs light up on the device. When I plug the USB-232/4 into a Windows PC that hasn't updated (running Windows 10, version 1709 or 1809), the USB-232/4 is seen and works normally. 


There have been various reports about glitches or issues after updating to Windows 10, version 1903 or 1909, with some reported as known or resolved issues on the Microsoft Known Issues Pages .

Fixes for this particular issue where Windows 10, version 1909 doesn't recognise the USB-232/4 device include:
  • Force Reinstall Non-Working or Corrupt NI Software.
    1. For the USB-232/4, force reinstall NI-VISA and NI-Serial.
      1. For other hardware, check the product manual for the correct drivers to force reinstall. 
    2. Check the USB device is recognised in NI MAX or Windows Device Manager .
  • Update drivers.
    1. Completely uninstall both drivers and install the most recent driver version your LabVIEW version supports.
      1. For the USB-232/4, view the NI-VISA Readme and NI-Serial Readme to check compatibility. 
      2. For other hardware, check the relevant driver readme files.
    2. Check the USB device is recognised in NI MAX or Windows Device Manager.
  • Roll back the Windows 10, version 1909 to a previous working version. Review the Microsoft website for Recovery options in Windows 10  for more details.