Prolific Usbtoserial Comm Port Version 333114 Driver Now
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).
Important Compatibility Note:
| Operating System | Native Compatibility | Required Action |
| :--- | :--- | :--- |
| Windows 11 22H2+ | Partial (Genuine GC/GS only) | Use driver v3.3.3.114 for new chips; for old chips, downgrade to v3.3.2.105 or older. |
| Windows 10 21H2+ | Partial (Same as above) | Same as above. |
| Windows 7 / Embedded | Full (with warning) | Installer runs, but old HX/HXD chips will still fail due to driver internal PID/VID blocklist. |
| Linux (any) | Full | Driver irrelevant – uses native pl2303.ko kernel module. |
| macOS | N/A | Prolific does not provide signed v3.3.3.114 for modern macOS; use Apple’s built-in driver. |
Installing the Prolific USB-to-Serial Comm Port version 333114 driver requires careful attention, especially on modern Windows 10/11 systems. Follow this exact procedure. prolific usbtoserial comm port version 333114 driver
Disable automatic driver updates (Windows 10/11):
Run the installer as Administrator.
Plug in your USB-to-serial adapter – Windows should now use v3.3.3.114. This driver package installs the necessary software to
If Windows still forces a newer driver, use pnputil or Group Policy to block driver updates for VID_067B&PID_2303.
Cause: Windows has loaded a newer native driver (or a conflicting version) on top of 333114. Solution:
The Prolific USB-to-Serial Comm Port Version 333114 driver is a software component that allows a Windows operating system to communicate with a USB-to-RS232 converter cable based on Prolific’s PL-2303 chipset. The "333114" refers to a specific driver version number released by Prolific Technology Inc. Disable automatic driver updates (Windows 10/11):
Think of the driver as a translator. Your computer speaks USB; your serial device speaks RS-232. The driver and the Prolific chip together handle the real-time conversion. Without the correct driver, Windows will either fail to recognize the adapter or assign it a generic label with limited functionality.
Cause: Modern Windows requires signed drivers. Version 333114 may not be WHQL-signed for the latest OS builds. Solution (Temporary): Disable driver signature enforcement.
Common error signs that 333114 can resolve:
