Name: Silicon Labs CP210x Driver
Author: Silicon Labs

Question 1

Install fails or is blocked?

Accepted Answer

Run the CP210x VCP installer as administrator. If Windows blocks it, check Driver Signature Enforcement or use the signed Silicon Labs release matching your Windows version.

Question 2

Device not detected / no COM port?

Accepted Answer

Try another USB cable and port, then check Device Manager for “Unknown device” or “CP210x.” Install the VCP driver manually via “Update driver” and rescan for hardware changes.

Question 3

Version conflicts after Windows Update?

Accepted Answer

Older OEM CP210x drivers can override newer ones. In Device Manager, uninstall the device and select “Delete the driver software,” then reinstall the latest Silicon Labs CP210x VCP driver and restart.