For technicians, engineers, and hobbyists, the Prolific PL2303 chipset is a staple for converting USB ports to RS-232 serial interfaces. However, with Windows 10 and 11 updates, newer drivers often cause "fake" or older Prolific chips to stop working, typically throwing a in Device Manager.

The Prolific USB to Serial Comm Port driver version 3.2.0.0 is an older driver that may still be used in certain situations. However, I recommend using the latest driver version available from Prolific or considering alternative drivers from FTDI. Always ensure that you download drivers from reputable sources to avoid potential security risks.

for ham radios and other serial equipment. Step-by-Step: Downloading and Installing Version 3.2.0.0

What (like Code 10 or Code 43) is showing up in your Device Manager?

file and follow the prompts. Note that this might not immediately fix the issue if a newer driver is already active. Manual Rollback in Device Manager Device Manager (Right-click Start > Device Manager). Ports (COM & LPT) and right-click your "Prolific USB-to-Serial Comm Port". Update driver Browse my computer for drivers Let me pick from a list of available drivers on my computer Choose the version that specifically says and click Next. Verify the Fix

For newer Windows 11 systems, some users have found success with version 3.8.38.2 if 3.2.0.0 absolutely fails, though 3.2.0.0 is better for old PL2303HXA/XA chips.

Even with the legacy driver, issues may arise. Here is how to solve the most common problems.

Newer Prolific drivers (v3.8 and above) are designed to disable older hardware versions or chips that Windows deems "unsupported". Version 3.2.0.0 is widely recognized by enthusiasts—especially in the radio programming community—as the last "universal" version that works reliably on Windows 10 and 11 for older hardware. Step-by-Step Installation Guide To get your COM port working again, follow these steps: Download the Driver : Locate the Prolific 3.2.0.0

Right-click the device > Uninstall device > Check the box "Delete the driver software for this device" . Reinstall: Perform the manual steps in Section 2 again.

Click .

The chipset is a ubiquitous bridge IC used to convert a USB port into a legacy RS-232 serial port. It is found in countless USB-to-DB9 adapters, programming cables, GPS receivers, and industrial control interfaces.

: Remove the adapter from your PC before starting the installation.