Prolific Usbtoserial Comm Port Version 333114 Driver 🆕

What is the of your USB-to-Serial adapter?

This created a frustrating situation where perfectly functional, older adapters would suddenly show a yellow exclamation mark in Device Manager and fail to start with a "Code 10" error when using the latest drivers.

Many users encounter a "This device cannot start (Code 10)" error when using older Prolific adapters with Windows 10 or 11. This typically occurs because Windows automatically updates to a newer driver that no longer supports end-of-life (EOL) chips like the PL-2303HXA

What are you trying to connect (e.g., radio, GPS, router)? prolific usbtoserial comm port version 333114 driver

If you are interested, I can also show you how to for this device, ensuring it doesn't break again. PROLIFIC USB-TO-SERIAL COMM PORT WINDOWS 10

The Prolific USB-to-Serial COM Port driver version 3.3.3.114 is a legacy software component essential for connecting serial-based devices (like GPS, modems, and barcode scanners) to modern PCs. While newer versions exist, version 3.3.3.114 is often sought after as a "fix" for older hardware chips that are no longer supported by the latest Windows 10 and 11 updates. 🛠️ Essential Driver Facts

The Prolific PL2303 USB-to-Serial adapter bridges the gap between modern computers and legacy hardware. However, finding and maintaining the correct driver version can be a major challenge. What is the of your USB-to-Serial adapter

In the mid-2000s, the market was flooded with counterfeit, cloned PL2303 chips manufactured by third parties. These clones cloned the hardware IDs of genuine Prolific chips, meaning Windows recognized them as official Prolific hardware. 2. Prolific's Countermeasure

The is one of the most widely used chipsets for connecting legacy serial (RS-232) devices to modern computers via USB. From programming routers and configuring industrial PLCs to connecting GPS receivers and scientific instruments, these adapters remain essential.

The yellow exclamation mark should instantly disappear, and a working COM port number (e.g., COM3) will display next to the device name. How to Prevent Windows Update from Overwriting the Driver While newer versions exist, version 3

: Ensure you have the correct model number of your adapter. It's usually listed on the device itself or in the device properties in Windows.

Click . Windows will install the selected driver, and the yellow triangle should instantly disappear. Preventing Windows Update from Breaking the Fix

Note: This stops Windows from updating all device drivers, meaning you will need to update graphics cards or audio drivers manually. Method C: Use Group Policy (Windows Pro/Enterprise)

If the driver installs but still shows an error, your cable may use a very old "PL-2303XA/HXA" chip which Prolific officially discontinued in 2012. Version 3.3.3.114 is your best chance, but ensure you have disabled "Windows Update" for drivers, or Windows will immediately overwrite it with a newer, non-working version.

If you let Windows Update install the driver automatically, it will likely install a newer version that fails. Follow these steps to force the installation of the working legacy driver.