#OLD PROLIFIC USB TO SERIAL DRIVER DRIVER#

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

In the Properties Window, Click on 'Driver'.

Scroll down to Ports (Com & LPT) and double-click on 'Prolific USB-to-Serial Comm Port (COM#)'.

Windows XP: Control Panel Р’В» System Р’В» 'Hardware' tab Р’В» Device Manager.

Windows Vista/7/8/10: Control Panel Р’В» System Р’В» Device Manager.

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.

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

When it prompts you, plug in one (1) of your USB-To-Serial adapters and click 'Continue'.

Unplug all USB-To-Serial adapters from your computer - and double-click on 'PL2303_64bit_Installer.exe'.

Download and save the 'PL2303_64bit_ Installer.exe' by clicking here.

VID_067B&PID_2303 for 'Prolific USB-to-Serial Comm Port'

Supported device ID and product strings.

Device using PL-2303 H/HXA/HX/X version chips.

#OLD PROLIFIC USB TO SERIAL DRIVER WINDOWS 10#

All Windows 64-bit operating systems including Windows 10.

#OLD PROLIFIC USB TO SERIAL DRIVER INSTALL#

Only 64-bit driver I have ever found that works with all the 'Prolific' adapters is Version 3.3.2.102.Р”В«elow 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. 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. (What worsens this issue is that there are many 'Prolific Driver Removal Tools' that do not work properly.)Р”Р„nd 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. 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. 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. Or you may get no error at all, but your device will still not work. 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. Unfortunately this decision also renders all earlier adapters inoperative. To solve this intellectual infringement - original Prolific company modified their newest drivers to render the counterfeit adapters unusable. The counterfeit chip use the same Vendor ID (VID_067B) and Product ID (PID_2303) - as the authentic Prolific chips. Main cause of this issue is because the device you own contains a counterfeit 'Prolific' chip (China clone). Even vendors selling their 'USB to Serial' adapters are baffled.

'Device driver was not successfully installed'Р”Р„vailable forum solutions to this problem are half-baked.

Issue will also may show messages like this: This confirms you need to install correct driver file.) That means correct driver version is not installed.)Р”Р„nd if you double-click on it, you will see:

(Notice in above picture, yellow triangle next to 'Prolific USB-to-Serial Comm Port (COM X)'. Works on 32/64-bit.Р”Р„nd it addresses issue of: Prolific PL-2303 Driver Fix (VID_067B&PID_2303)Р”Вriver issue will show inside your Device Manager like this:

In summary, this article is for: Windows XP, Windows 7, Windows 8, Windows 8.1 and Windows 10.

#OLD PROLIFIC USB TO SERIAL DRIVER HOW TO#

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

Old prolific usb to serial driver