3.3.2.105 — Prolific

Version 3.3.2.105 is an older, legacy driver release. It is highly sought after by technicians and hobbyists because it tends to be more tolerant of counterfeit/fake Prolific chips than the newest official drivers.

Newer official drivers (versions 3.4 and above) intentionally trigger a "Code 10" error if they detect a non-genuine Prolific chip. Version 3.3.2.105 often allows these clone chips to function correctly, making it a preferred choice for users troubleshooting USB programming cables (e.g., Baofeng, Kenwood, Yaesu radio cables).

If you are installing this driver to fix a "Code 10" error or to get a programming cable working:

Summary

Key improvements

  • Compatibility and platform support
  • User-facing bug fixes
  • Developer / API changes
  • Performance

    • Security

    Upgrade notes

  • Rollback: A rollback path is available to the previous 3.3.1.x build; ensure backups of configuration and DB snapshots before upgrading.

    • Known issues and limitations

    Changelog (high level)

    Contact and support

    If you want, I can:

    Prolific 3.3.2.105: The Definitive Guide to This Critical USB-to-Serial Driver

    In the world of industrial automation, amateur radio, and legacy hardware support, few software components are as vital—or as misunderstood—as the Prolific PL2303 USB-to-Serial driver. Specifically, version 3.3.2.105 has become a legendary "golden version" for users worldwide.

    If you’ve ever struggled with a "Code 10" error or a "Non-genuine Prolific chip" warning in Windows Device Manager, this specific driver version is likely the solution you’ve been looking for. Why Version 3.3.2.105 Matters

    The Prolific PL2303 is one of the most common chipsets used to bridge the gap between modern USB ports and older RS-232 serial interfaces. However, a major rift occurred when newer Windows updates began automatically installing drivers that intentionally disabled older or "cloned" (counterfeit) chips. Prolific 3.3.2.105 is highly sought after because: prolific 3.3.2.105

    Broad Compatibility: It was released before Prolific implemented strict hardware validation checks that disable non-original chips.

    Stability: It offers high reliability for GPS units, telescopes, routers, and PLC programming cables.

    Legacy Support: It works seamlessly on Windows 7, 8, 10, and even Windows 11 when configured correctly. Common Issues Solved by 3.3.2.105

    The primary reason users hunt for this specific version is the dreaded Yellow Exclamation Mark in the Device Manager. Usually, Windows will auto-update to a 2021 or 2023 driver version, resulting in one of these errors: “This device cannot start. (Code 10)”

    “PL2303HXA PHASED OUT SINCE 2012. PLEASE CONTACT YOUR SUPPLIER.”

    By rolling back to version 3.3.2.105 (which dates back to approximately 2008), you bypass these software blocks, allowing the hardware to communicate with your PC again. How to Install Prolific 3.3.2.105 Correctly

    Simply downloading the file isn't enough; Windows will often try to "help" by overwriting it with a newer, non-working driver. Follow these steps for a permanent fix: Disconnect your USB device.

    Uninstall current drivers: Go to Device Manager, right-click the "Prolific USB-to-Serial Comm Port," and select "Uninstall device." Check the box for "Delete the driver software for this device."

    Install 3.3.2.105: Run the installer for the 3.3.2.105 version. Plug in your device. Manual Selection: Right-click the device in Device Manager > Update Driver. Select "Browse my computer for drivers."

    Select "Let me pick from a list of available drivers on my computer."

    Choose the version labeled 3.3.2.105 [2008-10-27] and click Next. Security and Performance Notes

    While version 3.3.2.105 is a lifesaver for older hardware, keep in mind that using older drivers can sometimes lead to stability issues on the latest versions of Windows 11. Always ensure you are downloading the driver from a trusted source, as many "driver update" websites bundle malware with older software packages.

    If your project requires 24/7 uptime in a mission-critical environment, it may eventually be more cost-effective to upgrade to hardware using the FTDI chipset, which generally avoids these driver-conflict issues. Conclusion

    The Prolific 3.3.2.105 driver remains the "silver bullet" for keeping older USB-to-Serial adapters out of the landfill. By manually forcing Windows to use this specific version, you can restore functionality to your specialized equipment in minutes. Version 3

    To use the Prolific USB-to-Serial Comm Port driver (version 3.3.2.105), you typically need to perform a manual "roll back" or selection because Windows 10 and 11 often automatically install a newer, non-functional driver for older (often clone) PL2303 chips. Guide to Installing Prolific Driver 3.3.2.105

    This version is specifically used to fix "Code 10" errors on older PL2303HXA or PL2303XA chips that have been phased out by Prolific. 1. Preparation

    Download the Driver: Search for the "Prolific 3.3.2.105" installer or "Vista" legacy driver package. High-quality sources for these legacy files often include Miklor or Haprofs.

    Run the Installer: Execute the .exe file before plugging in your cable. This places the specific driver version into your system's driver store. 2. Manual Driver Selection (Crucial Step)

    Even after installing, Windows may still use the wrong version. You must force it to use 3.3.2.105:

    Open Device Manager: Right-click the Start button and select Device Manager.

    Locate the Device: Look under Ports (COM & LPT). You will likely see "Prolific USB-to-Serial Comm Port" with a yellow warning triangle.

    Update Driver: Right-click the device and select Update driver. Manual Search: Select Browse my computer for drivers.

    Pick from List: Select Let me pick from a list of available drivers on my computer.

    Select Version 3.3.2.105: Uncheck "Show compatible hardware" if necessary, but you should see Prolific USB-to-Serial Comm Port Version 3.3.2.105 [27/10/2008] in the list. Select it and click Next. 3. Verification The yellow triangle should disappear.

    Note the COM Port number (e.g., COM3) assigned to the device; you will need this in your specific software (like PuTTY or radio programming tools). Troubleshooting

    Prolific 3.3.2.105 refers to a legendary version of the PL2303 USB-to-Serial driver. Released in October 2008, this specific build is the "magic bullet" for fixing connection errors on Windows 10 and 11. Why Version 3.3.2.105 Matters

    Modern Windows systems automatically download the latest Prolific drivers. However, these newer versions intentionally disable support for older or "counterfeit" PL2303 chips. This results in frustrating errors like: Note: How to not get scammed with Prolific (PL2303) USB

    Understanding the Prolific USB-to-Serial Driver (Version 3.3.2.105) Key improvements

    Hardware enthusiasts often seek specific versions like 3.3.2.105 because newer Prolific drivers frequently fail to work with older or "counterfeit" Prolific PL2303 chips. While modern operating systems like Windows 10 and 11 attempt to auto-update to the latest version, this specific legacy version is widely cited in community forums as a "workhorse" for stability. 1. Why Specific Driver Versions Matter

    Modern Prolific drivers include checks to detect if a chip is genuine. If the chip is older or a clone, newer drivers may return a "Code 10" error (This device cannot start). Users often manually install version 3.3.2.105 to bypass these compatibility checks and restore functionality to their hardware. 2. Key Installation & Compatibility Tips

    To ensure this driver version functions correctly, users typically follow these steps:

    Disable Auto-Updates: Windows may try to overwrite this version with a newer, non-functional one. Users often use the Microsoft Show or Hide Updates tool to block newer versions.

    Application Launcher: Some specialized hardware requires an "Application Launcher" or a specific .NET Framework to bridge the communication between the software and the driver.

    Manual Selection: In the Device Manager, users often have to "Browse my computer for driver software" and "Let me pick from a list" to force the system to use the 3.3.2.105 version over a more recent one. Troubleshooting Common Connection Issues

    Even with the correct driver, you might encounter a "NO connection" error during hardware updates (such as updating firmware on flight instruments or radios).

    Check COM Ports: Ensure the software is looking at the correct COM port (e.g., COM6) as assigned in the Device Manager.

    Power State: Some devices must be turned off or in a specific "update mode" before the Prolific driver can successfully initiate a handshake. Contextual Note: Prolific Research Platform

    If you were looking for information on the Prolific academic research platform, it is a separate entity used for recruiting participants for longitudinal and multi-part studies. Researchers on that platform focus on:

    Longitudinal Studies: Creating "waves" of surveys where participants are invited back for follow-up sessions.

    Ethical Pay: Recommending a minimum of $12.00 per hour to ensure high data quality.

    Integration: Using tools like Qualtrics or Gorilla to host complex experiments.