Silicon Labs CP210x Driver (Code 39) error

Hello, i use the CP210x driver to interface with my Kenwood transceiver and it's stopped working and i get the following errors showing up. The problem is not with the transceiver because it works fine on a laptop with Windows 10 installed.



I also ran USBView



Tried uninstalling then manually deleting as directed on Silicon labs website then reinstalling but still the same error.
If anyone can help me out before i have to reinstall Windows 10 not sure what else to try to fix it.

Thanks.

Running Windows 10 Version 22H2 (OS Build 19045.3031)

Megahertz said:

I understand it was working.
Did you install the CP210x driver or Windows found one?

Hello,
Yes it was working, i installed the CP210x driver first with the USB cable unplugged then plug in the USB cable as directed by Kenwood.

- - - Updated - - -

I did uninstall a serial port monitor software from electronic team, inc and that's when it stopped working.

Megahertz said:

The serial port monitor software you've uninstall could have part of CP210x driver.
On Device manager, right click on CP210x and select uninstall.
Shutdown, remove the CP210x and restart. Install the driver and then connect the CP210x.

Already tried that several times the error still happens.

In Device Manager >Ports,RIGHT click on Silicon Labs.
Then select "Properties " and then the "Driver "tab and see who is the driver provider and whilst there select "Update Driver " and check whether or not the driver version is changed.
If this does not work,use Powershell as admin and type in ---dism /online /cleanup-image /restorehealth ---followed by ---sfc /scannow ---which should repair any file corruption which might have occurred during the uninstall process.

The driver should come directly from Silicon Labs:

CP210x USB to UART Bridge VCP Drivers - Silicon Labs

I use this driver all the time and had a similar issue when I removed a serial port monitoring program. In my case, all of my USB devices (including keyboard) stopped working. The reason is that these serial port monitoring programs insert a "man in the middle" bit of code to help redirect the serial stream to the monitoring program. Unfortunately, they all seem to have sloppy uninstallers that either don't remove the "man in the middle" code, or else remove it and don't link the serial port with Windows again like it should.

DISM may help restore your main serial drivers under Windows, or it may not. Re-installing the serial port monitor may get the serial port working again, but when it is removed again, the port may stop working. You may have to live with it being in your system unless you can find a way to reassert control of the serial port with Windows. I wish I could remember how I resolved my issue, but it was a while ago.

One thing you could try is to re-install the serial port monitor program and then use something like Revo Uninstaller in Administrator mode to try and remove everything. Then install the Silicon Labs driver again.

As an aside, do your other serial ports work? I'll bet they don't.

Catnip said:

The driver should come directly from Silicon Labs:

CP210x USB to UART Bridge VCP Drivers - Silicon Labs

I use this driver all the time and had a similar issue when I removed a serial port monitoring program. In my case, all of my USB devices (including keyboard) stopped working. The reason is that these serial port monitoring programs insert a "man in the middle" bit of code to help redirect the serial stream to the monitoring program. Unfortunately, they all seem to have sloppy uninstallers that either don't remove the "man in the middle" code, or else remove it and don't link the serial port with Windows again like it should.

DISM may help restore your main serial drivers under Windows, or it may not. Re-installing the serial port monitor may get the serial port working again, but when it is removed again, the port may stop working. You may have to live with it being in your system unless you can find a way to reassert control of the serial port with Windows. I wish I could remember how I resolved my issue, but it was a while ago.

One thing you could try is to re-install the serial port monitor program and then use something like Revo Uninstaller in Administrator mode to try and remove everything. Then install the Silicon Labs driver again.

As an aside, do your other serial ports work? I'll bet they don't.

Well i admit defeat, going to go ahead and reinstall Windows. Seem to have exhausted all avenues of getting it to work.

Thanks everyone for the suggestions and help.