Windows 10: CH340 Usb to serial converter does not work on windows 11 even if I see it OK in device manager

HelloI'm using a CH340 usb serial converter which is working fine on windows 10 but not in Windows 11, even if it seems ok in device manager. I can not open a com... I have read that it is possible to redirect it to a virtual serial port ot make it running. Which free tool can I use or does a fix exist without redirection ? Thanks for your support

:)

 

Can't get USB to serial converter to work

Hi, here to work with you on this issue.

If Windows is indicating that the USB to serial converter won't start and suggests reloading the driver, but you've already attempted that and it still doesn't work, there are a few troubleshooting steps you can try:



1. Unplug and reconnect the USB to serial converter: Disconnect the converter from your computer's USB port and wait for a few seconds. Then plug it back in, ensuring it is securely connected. Sometimes, a simple reconnection can resolve connection issues.



2. Try a different USB port: Connect the USB to serial converter to a different USB port on your computer. It's possible that the current port you're using is experiencing problems, and trying a different one might help.



3. Restart your computer: Sometimes, a system restart can fix driver-related issues. Restart your computer and see if the USB to serial converter starts working after the reboot.



4. Update the driver manually: Even if Windows claims the correct driver is installed, there's a possibility that it may be outdated or corrupted. You can try manually updating the driver by following these steps:



a. Go to the Device Manager by right-clicking on the Start button and selecting "Device Manager" from the menu.



b. In the Device Manager window, locate the USB to serial converter. It might be listed under "Ports (COM & LPT)" or "Universal Serial Bus controllers."



c. Right-click on the USB to serial converter and select "Update driver" from the context menu.



d. Choose the option to manually search for the driver. You can either provide the specific driver file if you have it or let Windows search online for the latest driver version.



e. If Windows finds an updated driver, follow the on-screen instructions to install it. Once the installation is complete, restart your computer and check if the converter starts working.



5. Contact the manufacturer's support: If none of the above steps resolve the issue, it's recommended to reach out to the manufacturer's support for further assistance. They may provide specific troubleshooting steps or advice tailored to your USB to serial converter model.



Remember to provide as much information as possible when contacting support, such as the make and model of the USB to serial converter and the version of Windows you're using.

I hope this is helpful. If you require any additional assistance, don't hesitate to respond to this.

Regards,

 

Issues with USB-to-Serial on Windows 10

Follow this procedure and tell me if it works to solve the problem:

Go to the Device Manager and type “Device Manager” in the lower left corner of the screen.

Locate the USB to Serial Converter Settings. After plugging a USB device into your machine, expand the “Universal Serial Bus controllers” list in Device Manager. Click on the “USB Serial Converter” and open the USB Serial Converter properties.
Enable the VCP Driver loading by opening the “Advanced” tab within the USB Serial Converter properties. Make sure the “Load VCP” option is enabled and then click OK to load the VCP.
Re-connect the device. Unplug the USB device and re-connect it to your computer. At this time, Windows 10 should recognize the device and load the Virtual Com Port Driver.

 

usb serial converter not working

Hi, Rick Page1

Welcome to the Microsoft Community.



If your USB to RS232 serial adapter with a Prolific chipset stopped working after a system update and you have tried various troubleshooting steps without success, here are some additional steps you can take to try and resolve the issue:

1. Check Device Manager:
   
   • Press Windows key + X and select "Device Manager."
     
   • Look for any devices with a yellow exclamation mark or under "Other devices" that may indicate a problem with the adapter.
     
   • Right-click on the problematic device and select "Update driver" to see if Windows can find a compatible driver.
     
2. Uninstall and Reinstall Driver:
   
   • Uninstall the current driver for the USB to RS232 adapter.
     
   • Disconnect the adapter, restart your computer, and then reconnect the adapter to reinstall the driver automatically.
     
3. Download Latest Driver: Visit the Prolific website or the manufacturer's website for the latest driver specifically designed for your adapter model and the updated operating system version.
   
4. Test on Another Computer: To ensure the issue is not with the USB to RS232 adapter itself, test it on another computer to see if it works correctly.
   

If none of these steps resolve the issue, you may need to contact the manufacturer for further assistance or consider using a different adapter that is compatible with the updated system.

Best Regards

Martin | Microsoft Community Support Specialist