Prolific Port Devices Driver

Prolific Port Devices Driver Updater
Prolific Port Devices Driver
Prolific Port Devices Drivers

All this devices use a PL2303 to provide a connection to an USB port, but inside, they are RS232-like interface build (and appear as a COM port in your operating system). When you plug the device into USB, it is well recognized by W10 and it try to load the Prolific driver. Connect with HP support faster, manage all of your devices in one place, view warranty information and more. Prolific USB-to-Serial Comm Port Driver.

Plug in your Prolific USB to Serial adapter, go into Device Manger, and then Scroll down to Ports Com & LPT and Double-click on Prolific USB-to-Serial Comm Port COM#, or in some cases, Other Device. Due to Prolific USB/Serial chip 'clones' found in generic USB programming cables, an older driver is required in lieu of the one supplied by Windows. Download driver Prolific USB-to-Serial Comm Port COM3 Driver version 3.8.18.0 v.3.8.12.0 for Windows XP, Windows 7, Windows 8, Windows 8.1, Windows 10 32-bit x86, 64-bit x64. The problem relates to Serial Comm Port driver. Once there do the following, As you can see Windows has set the port to COM10.

Article credit goes to: ifamilysoftware.com
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Purpose of this article is to guide you on how to FIX the 'Prolific USB-to-Serial' driver issue with common cheap units.

In summary, this article is for: Windows XP, Windows 7, Windows 8, Windows 8.1 and Windows 10. Works on 32/64-bit.

And it addresses issue of: Prolific PL-2303 Driver Fix (VID_067B&PID_2303)

Driver issue will show inside your Device Manager like this:

(Notice in above picture, yellow triangle next to 'Prolific USB-to-Serial Comm Port (COM X)'. That means correct driver version is not installed.)

And if you double-click on it, you will see:

(Notice in above picture, Code 10 error. This confirms you need to install correct driver file.)

Issue will also may show messages like this:

'This Device cannot start (Code 10)'
'No driver installed for this device'
'Device driver was not successfully installed'

Available forum solutions to this problem are half-baked. Even vendors selling their 'USB to Serial' adapters are baffled.

Main cause of this issue is because the device you own contains a counterfeit 'Prolific' chip (China clone).

The counterfeit chip use the same Vendor ID (VID_067B) and Product ID (PID_2303) - as the authentic Prolific chips.

To solve this intellectual infringement - original Prolific company modified their newest drivers to render the counterfeit adapters unusable. Unfortunately this decision also renders all earlier adapters inoperative.

The Prolific 64-bit drivers that Microsoft supplies via Windows Update, Versions 3.4.67.325, 3.4.25.218, 2.1.51.238 and 3.4.62.293 - will not work with most adapters and therefore shows the generic 'Code 10' error.

Or you may get no error at all, but your device will still not work.

If your adapter was working prior to going to Windows Update, you can 'roll back' to the previous installed driver and all will be well once again.

However if you didn't have a previous driver installed that worked - you'll have to go through the process of removing any PL-2303 driver installation programs, the actual driver files, and the information (.INF) file, BEFORE you are able to successfully install the correct driver.

(What worsens this issue is that there are many 'Prolific Driver Removal Tools' that do not work properly.)

And Windows 8, 8.1 and Window 10 are set by default to automatically update your drivers without your permission or even notifying you of the update.

So no matter how many times you remove the driver files and reboot - the next time you insert the USB-To-Serial adapter, Windows installs the newest non-working version again.

Only 64-bit driver I have ever found that works with all the 'Prolific' adapters is Version 3.3.2.102.

Below installer program will remove all of the incompatible drivers — make a change so that Windows can never update the driver without your approval — and install the Version 3.3.2.102 compatible drivers.

All Windows 64-bit operating systems including Windows 10
Prolific USB to Serial Adapter .
Device using PL-2303 H/HXA/HX/X version chips
Driver Version: 3.3.2.102
Driver Date: 09/29/08
Supported device ID and product strings: . VID_067B&PID_2303 for 'Prolific USB-to-Serial Comm Port'

Steps:

Download and save the 'PL2303_64bit_ Installer.exe' by clicking here.
Unplug all USB-To-Serial adapters from your computer - and double-click on 'PL2303_64bit_Installer.exe'
When it prompts you, plug in one (1) of your USB-To-Serial adapters and click 'Continue'.
Reboot your computer. That's it!

Troubleshooting:

You must follow ever step in the process in exact order.

If you still receive an error after running the PL-2303_64bit_Installer.exe and your device is plugged in - go to Windows Device Manager.
- Windows Vista/7/8/10: Control Panel » System » Device Manager
- Windows XP: Control Panel » System » 'Hardware' tab » Device Manager
Scroll down to Ports (Com & LPT) and double-click on 'Prolific USB-to-Serial Comm Port (COM#)'.
In the Properties Window, Click on 'Driver'.

The 'Driver Version' must say '3.3.2.102' dated 09/24/08.

If not, then the correct driver is not installed.
Unplug the USB-To-Serial adapter and run the 'PL2303_64bit_Installer.exe' again - following the directions precisely until the correct driver appears.