In late 2021 and throughout 2022, Windows updates often automatically replaced working legacy drivers with newer versions that caused hardware to stop functioning. Version 3.2.0.0 is the most stable "rollback" choice for users with:
Windows will likely try to immediately override what you just installed with its own choice. You must manually change it: Press Windows Key + X and select . Scroll down and expand Ports (COM & LPT) .
While this protects intellectual property, it breaks functionality for millions of legacy DIY electronics, legacy console cables, and third-party adapters that rely on older chip designs. Version 3.2.0.0 remains highly sought after because it does not include the hardware enforcement script, allowing older chips to communicate with Windows 10 and Windows 11 seamlessly. Step-by-Step Guide to Installing Driver Version 3.2.0.0 prolific+usb+to+serial+comm+port+version+32+00+download+2021
: Look for the entry labeled Prolific USB-to-Serial Comm Port Version: 3.2.0.0 [2007-07-31] and click Next .
Counterfeit PL2303 chips are alarmingly common, especially from low-cost adapters purchased on eBay, Amazon, or Alibaba. Prolific has publicly warned that such chips are sold using its trademark logo, product name, and drivers—and it will no longer support them. In late 2021 and throughout 2022, Windows updates
The Prolific USB to Serial Comm Port is a software driver that enables USB ports to emulate serial ports, allowing devices that require serial communication to connect to a computer via USB. This driver is commonly used for devices such as:
Even after installing, Windows may automatically use a newer, non-working driver. You must manually select the 2007/2008 version 3.2.0.0. Scroll down and expand Ports (COM & LPT)
Which are you running (Windows 10 or Windows 11)?
Right-click (which likely has a yellow warning triangle) and select Update driver . Click Browse my computer for drivers .