Prolific Usbtoserial Comm Port | Version 333114 Driver

If this driver fails for you, consider:

Notes on Windows compatibility and unsigned-driver issues

Troubleshooting the Prolific USB-to-Serial COM Port Version 3.3.3.114 Driver

This driver package installs the necessary software to enable communication between a PC and a device connected via a Prolific PL2303-based USB-to-Serial adapter. Version 3.3.3.114 is a legacy driver intended for older operating systems and older PL2303 chip revisions (specifically PL2303 HXA, XA, or older revisions).

Choose the 3.3.3.114 (or any 2008/2009 version) from the list and click Next . prolific usbtoserial comm port version 333114 driver

You will see a list of installed drivers. Select the older version (e.g., or Version 3.3.2.102 ).

Locate the 3.3.3.114 .exe or .zip from a trusted driver archive.

This is where (and its sibling 3.3.2.105) became a hero. This specific 2009 version didn't have the strict "counterfeit detection" of its successors. For years, engineers and hobbyists have passed this version around like a secret key, manually rolling back their drivers to 3.3.3.114 to bring their "dead" cables back to life. Prolific Usb-to-serial Comm Port Version 3.3.3.114 Download

Check the box that says and click Uninstall . Step 4: Run the 3.3.3.114 Installer Open the extracted folder on your Desktop. If this driver fails for you, consider: Notes

is the "magic" driver because it predates this lockout. It works with both genuine and clone chips. It is compatible with Windows 7, 8, 10, and 11 (64-bit). 🛠️ How to Install and Fix "Code 10"

: Version 3.3.3.114 was originally designed for Windows Vista and Windows 7, but it is one of the few versions that still functions reliably on Windows 10 and 11 for these older chipsets.

: If you're using Windows, you can also try searching the Microsoft Update Catalog website. Sometimes, drivers are distributed through Windows Update, and you can manually search and download them from there.

The root cause of this problem is almost always a driver mismatch, specifically involving . This guide will explain why this error happens and how to permanently fix it. Why Version 3.3.3.114 Causes Error Code 10 You will see a list of installed drivers

Right-click and select Uninstall device .

Summary

Understanding how to deploy, configure, and troubleshoot this driver is essential for working with legacy network equipment, amateur radios, industrial sensors, and legacy medical hardware. Understanding the Role of Prolific PL2303 Chips