Prolific Usbtoserial Comm Port Version 333114 Driver

Official, newer Prolific drivers delivered via Windows Update are designed to intentionally disable these older chips.

Look for PL2303_Prolific_DriverInstaller_v333114.zip or .exe . Step-by-Step Installation Guide (Windows 10/11)

If Windows updates the driver automatically in the future, navigate back to > Ports (COM & LPT) > Right-click Prolific USB-to-Serial... > Properties > Driver Tab . Click the Roll Back Driver button. Windows will revert to 3.3.3.114 and generally remember your preference for this specific USB port.

Only download drivers from reputable community forums or hardware manufacturers to avoid malware. prolific usbtoserial comm port version 333114 driver

Older hardware components, such as ham radios, GPS receivers, routers, and industrial controllers, use early-generation Prolific PL2303 microchips to bridge serial communication over standard USB lines.

The root of this issue almost always traces back to a specific driver version: (often dated around 2009).

Your Device Manager displays a yellow exclamation mark next to "Prolific USB-to-Serial Comm Port" with an Error Code 10 or Code 43 . > Properties > Driver Tab

Even the best driver can encounter issues. Here’s how to solve the most frequent problems.

The is more than just a piece of software. It is a bridge between the modern PC ecosystem and decades of industrial equipment, embedded devices, and scientific instruments. While newer drivers may be shinier and more secure, they often abandon the very chips that made Prolific a household name in serial conversion.

: The first and most recommended step is to visit the official Prolific Technology website. However, note that the company's website URL might have changed over time. A quick web search for "Prolific Technology official website" can help you find the correct link. Only download drivers from reputable community forums or

: Once you've downloaded the driver, follow the installation instructions provided. Typically, this involves unzipping the file, then running an executable file to install the driver.

Right-click your Prolific device and select .

If you want to prevent Windows from managing any of your hardware drivers automatically:

Windows has loaded a newer native driver (or a conflicting version) on top of 333114. Solution: