Prolific Usbtoserial Comm Port Version 333114 Driver Jun 2026

as Administrator.

To fix the error, you must completely remove the non-working driver and install the 3.3.3.114 version manually. Follow these step-by-step instructions: Step 1: Download the Driver Archive

Double-click .

Prolific Technology’s PL2303 series is a widely used family of USB-to-UART bridge controllers. The Prolific USB-to-Serial Comm Port driver allows a computer's operating system to recognize a PL2303-based adapter as a standard COM port, enabling communication with devices like routers, switches, microcontrollers, GPS receivers, and legacy industrial equipment.

To prevent conflicts, it is often best to uninstall the current (failing) driver: Open . Expand Ports (COM & LPT) . prolific usbtoserial comm port version 333114 driver

If Windows updates the driver in the future, you can quickly revert it:

Prolific has produced a wide range of PL2303 chips over the years. It is essential to know which one your adapter uses. as Administrator

The Prolific USB-to-Serial Comm Port, along with the version 3.3311.4 driver, offers a range of benefits, including:

Prolific updated their newer drivers to detect and block counterfeit or clone chips (a frequent issue with cheaper USB-to-serial adapters). Version 3.3.3.114 is often the last stable version before these strict enforcement measures began. Prolific Technology’s PL2303 series is a widely used