Mar 01, 2009  Update your computer's drivers using DriverMax, the free driver update tool - Ports - wch.cn - USB-SERIAL CH340 Computer Driver Updates. Try a driver checking tool such as DriverIdentifier Software. As there are many drivers having the same name, we suggest you to try the Driver Tool, otherwise you can try one by on the list of available driver below. Please scroll down to find a latest utilities and drivers for your USB-SERIAL CH340 (COM3) driver.

I think I just discovered the answer to my own problem based on your feedback. While digging up the information for my response to your questions, I discovered the specific com port that Windows had assigned to the Arduino (USB-SERIAL CH340 (COM11)). I selected that specific Com port in the Arduino program.and behold, it connected and is working just fine! Thank you for your willingness to help - it turns out that Windows already had the driver installed and the error was prominently located somewhere between the keyboard and deskchair.:).

Why do i see many drivers? Below is a list of drivers that may be suitable for your device. With the different devices, they can have the same driver, it's because they all use the same chip manufacturer. How to select driver? If you are looking for an update, pickup the latest one. If your driver isn't working, use the driver having the same OEM with the your laptop/desktop brand name.