Windows 10: How do I find what is using a serial port real or virtual?

How do I find what is using a device? I am trying to use COM18 for a virtual com port, but I get an error "COM18 already exists". COM18 does not appear in Device Manager, even with Show Hidden Devices selected. Nor does it appear in a search of the registry. I'm running Windows 11. I would greatly appreciate any suggestions.

:)

 

Hyper-V serial port

Hi

We have

Hyper-V Manager version: 10.0.18362.1

installed on Windows 10. We need to use serial port on victual machine, but could not get correct configuration. We tried some suggestions from internet, such as remote logon the virtual machine and use the serial port on host computer. It does not work neither.
What is the best way to get serial port on Hyper-V virtual machine?

 

Windows 11 - Real COM Port doesn't work but connected to virtual port it works

Hello!

I'm trying to use a CH340 RS232 to USB cable to communicate with another device through my laptops COM port. After connecting the device to my laptop it also shows up in the device manager but it seems that I'm unable to open the COM port for communication (I'm using LabVIEW but also tried using PuTTY).

The weird thing is that it works when I connect my real COM port to a virtual one with Virtual Serial Port Driver and then select the virtual port in LabVIEW.

Anybody had this problem or know what I could try?

 

Device Manager Serial Com Port Properties

Hi, Erik_192,

A WMI query would do it.

Using C#

WMI query shows a single USB serial COM port?

WMI: Get list of all serial (COM) ports including virtual ports

Related Threads:

Get COM PORT of USB Serial Device using the VID and PID on Windows - Aticleworld

A Useful WMI Tool & How To Find USB to Serial Adaptors