Prolific USB to Serial Bridge Driver

The Prolific USB to Serial Bridge driver lets Windows communicate with compatible serial devices through a Prolific-based USB adapter. You need it when connecting equipment such as serial consoles, barcode scanners, or industrial controllers, especially if the adapter appears as an unknown device or fails to create a usable COM port.

Key Features

• USB-to-serial connectivity: Enables compatible software to exchange data with serial equipment connected through a supported Prolific USB bridge.
• COM port access: Makes the adapter available as a serial port that you can select in terminal programs, configuration utilities, and other applications.
• Configurable communication settings: Supports serial settings such as baud rate, parity, and flow control, depending on the adapter and connected equipment.
• Windows compatibility: Driver packages are available for supported Prolific hardware on Windows 11, 10, 8, and 7. Compatibility depends on the chipset revision and driver release, so one package may not support every adapter.

How to Install Prolific USB to Serial Bridge Driver

1. Identify your adapter and Windows version. Open Device Manager and locate the adapter under “Ports (COM & LPT)” or “Other devices.” Check its hardware IDs if you need to confirm the model, and verify whether your system requires a 32-bit or 64-bit package.

1. Choose a compatible package. Before starting your Prolific USB to Serial Bridge driver download for Windows, check that the package supports both your chipset and operating system. For Windows 10/11, select the latest version that explicitly supports your hardware; older chipsets may require a different release.

1. Download and prepare the files. Use a trusted source for the free download, then extract the archive if necessary. Follow any included instructions about disconnecting the adapter before setup.

1. Install the driver. Run the supplied installer, or use Device Manager’s “Update driver” option and browse to the extracted driver folder. Restart Windows if prompted, then reconnect the adapter.

1. Verify the connection. Confirm that the adapter appears under “Ports (COM & LPT)” without a warning icon. Select its assigned COM port in your application and match the communication settings to your serial equipment.

Keep the driver updated when a compatible update addresses connection issues or improves support for your Windows version. If an update causes problems, check the adapter’s chipset compatibility and consider rolling back to the previously working driver rather than repeatedly installing an unsupported release.

Common Issues and Fixes

• Install fails or Code 10/43: Disconnect the adapter, uninstall any existing Prolific driver in Device Manager (select “Delete driver software”), reboot, then install the current Prolific driver as administrator before reconnecting.
• Device not detected / COM port missing: Try another USB port and cable. Confirm Device Manager shows “Prolific USB-to-Serial Comm Port.” If it shows “Unknown device,” reinstall USB/chipset drivers and check the adapter for damage or a non-genuine PL2303 chip.
• Version conflicts / yellow exclamation mark: Older PL2303 drivers can conflict with Windows 10/11 or newer chip revisions. Remove old Prolific entries, install the driver version matching your PL2303 variant (TA/HXD/RA), then set the correct COM port in your serial software.