Prolific+usb+to+serial+comm+port+version+32+00+((new)) Download+2021 Jun 2026

: The yellow exclamation mark should disappear, and the status should read "This device is working properly." Key Resources for Download & Troubleshooting

Many older USB-to-Serial adapters use Prolific chipsets (like the PL2303HXA) that reached "End-of-Life" (EOL) status years ago. Prolific's official newer drivers are designed to intentionally disable these older chips on modern Windows versions.

If your serial port stops working after a Windows system update, go back into Device Manager , right-click the device, go to Properties , choose the Driver tab, and click Roll Back Driver . Windows will remember your preference and stop updating that specific port.

The remains a gold-standard workaround for reviving legacy hardware components. By forcing Windows to communicate via this older, highly compatible architecture, you can extract years of extra utility out of perfectly fine hardware tools. prolific+usb+to+serial+comm+port+version+32+00+download+2021

For the installation to succeed, you must temporarily disable Windows’ driver signature enforcement:

The core reason for the struggle in finding a driver is this authentication check. Authentic Prolific chips, often bearing version numbers like PL2303HXD, GC, or GS, are fully compatible with the latest drivers from the manufacturer's official website (typically installer versions v4.0.0 and above). Conversely, counterfeit chips, which are almost always used in generic "Prolific" branded cables, are designed to be rejected by official drivers from 2021 onwards. The only reliable fix for these counterfeit adapters is to use a "legacy" driver, which was released before the authentication check was implemented. The most well-known of these is version (dating back to 2008), along with its immediate successors 3.3.3.114. Many users also report success with the even older 3.2.0.0 driver from 2007 as a last resort.

: Users often seek out the older "Version 3.2.0.0" or similar legacy drivers from 2008–2010 because these versions do not have the chip-version check and allow "counterfeit" or EOL chips to function. Step-by-Step Installation Guide : The yellow exclamation mark should disappear, and

: Ensure the driver version is compatible with your operating system version (Windows 10, Windows 11, Linux, macOS).

For users with authentic Prolific chips, this wasn't a major issue, as newer driver versions continued to work. However, for the vast majority of consumers who purchased inexpensive USB-to-Serial cables online—cables that almost always contain counterfeit chips—the updated drivers from 2021 rendered their hardware non-functional.

: Ensure your device is plugged into a USB 2.0 port if possible. 📥 How to Download and Install 1. Download the Driver Windows will remember your preference and stop updating

Why it mattered

You can use Microsoft's official Show or hide updates troubleshooter package. Run it, wait for it to scan, choose "Hide Updates", and select the Prolific driver from the list. This permanently bars Windows from downloading newer iterations of the port package.