To successfully use version 3.2.0.0, you must manually "roll back" the driver to prevent Windows from auto-updating it:
Unplug your USB-to-Serial cable before starting the installation. Run the Installer: Double-click the
: Run the 3.2.0.0 installer. If it asks to uninstall a newer driver first, allow it to do so.
Recommended as a "backdated" driver for Windows Vista through Windows 11 if newer drivers cause a yellow warning triangle or a "Phased Out" message in Device Manager. Sources:
Provide instructions for setting up the COM port in specific software (e.g., PuTTY, CNC software). USB to Serial Drivers - PROLIFIC - VE7ED prolific usb to serial comm port version 32 00 download 2021
Choose .
Instead of hunting for an outdated, unsafe driver:
Updating to or maintaining driver version 3.2.0.0 is a common task for hardware users. This guide explains how to find, install, and troubleshoot this driver version. Why Version 3.2.0.0 Matters
⚠️ : Many “driver download” sites bundle malware. Avoid driver-solution.com , drp.su , etc. To successfully use version 3
is highly sought after because it does not include the code that checks for counterfeit chips, making it the "fix" for many older USB-to-RS232 adapters.
: This version is highly recommended for older PL-2303HXA and PL-2303X chips that reached End-of-Life (EOL) and are no longer supported by modern Prolific drivers.
Since Windows may try to "fix" this by updating to a newer, incompatible version, it is recommended to turn off automatic driver updates for this specific device. Why Use Version 3.2.0.0? PL2303GC USB to Full UART Bridge Controller with GPIO
This article provides a guide to finding and installing this specific driver version, why it was relevant in 2021, and troubleshooting steps. Why Choose Prolific Driver Version 3.2.0.0? Recommended as a "backdated" driver for Windows Vista
Expand . You will likely see "Prolific USB-to-Serial Comm Port" with a yellow triangle. Right-click it and choose Update driver . Select Browse my computer for drivers .
To successfully install this driver, you must manually prevent Windows from automatically updating it back to a non-working version. Cables & Drivers - Prolific & FTDI - Miklor
Version 3.2.0.0 of the Prolific USB-to-Serial Comm Port driver remains an essential tool for anyone who relies on older Prolific-based serial adapters with Windows 10 or Windows 11. By circumventing the counterfeit-detection code that breaks compatibility, this 2007-era driver provides a reliable workaround for a problem that has frustrated countless users since Microsoft began aggressively updating drivers.