Prolific USB to Serial Controller Driver | Driver Details | Dell US

Guide to Prolific USB-to-Serial Comm Port Driver (Version 3.2.0.0)

Because version 3.2.0.0 is a legacy driver, you will not find it on the official, current Prolific website. It must be sourced from trusted driver archives or community hardware forums. Step 1: Download the Driver Archive

The driver Prolific USB to Serial Comm Port version 32.00 download 2021 represents the end of an era. After 2021, Prolific aggressively moved to newer chips, leaving millions of perfectly functional industrial, medical, and hobbyist serial adapters behind—not because the hardware failed, but because driver support was artificially restricted.

What (telescope, router, radio) are you connecting?

There is a massive market of counterfeit Prolific chips (PL2303) used in generic USB-to-Serial cables. To combat this, Prolific updated their drivers (versions 3.4 and higher) to detect fake chips. If a fake chip is detected, the driver disables the port, causing it to stop working.

This article provides a comprehensive guide to finding, downloading, and installing the driver, a classic version often sought after in 2021 and beyond to resolve compatibility issues with older RS232 programming cables on modern Windows operating systems.

: Some counterfeit cables use chips that are so poorly cloned that even version 3.2.0.0 cannot communicate with them correctly. In these situations, no software solution exists. The only reliable fix is to purchase a USB-to-serial adapter with a known good chipset, such as the FTDI FT232R or the WCH CH340. Both are well-supported in modern Windows and do not suffer from the same counterfeit-detection issues as Prolific.

Locate the specific executable or ZIP folder named PL2303_Profiler_DriverInstaller_v3.2.0.0 .

Disconnect the USB-to-Serial cable from your computer.