Prolific PL2303HX driver misery

IMG_4662Like many I have imported from China, USB to Serial devices with IC’s made by Prolific. Mine are PL2303HX based. And they do not work anymore! Yellow mark in Device Manager, device cannot start. Reason: Prolific made an update to their Windows drivers to fight the fake IC’s coming form China, like FTDI did (see my FTDI unbricking article) and amde older devices unusable. Windows update, which is by default automatic getting the latets drivers, make it impossible to install older drivers, just gets overwritten very fast.
But you can battle this and get the Prolific driver working again. I did this for two PL2303HX based USB interfaces. Tested with my PL2303HX USb devices and PuTTY serial and a jumper connecting TX-TD to see typed characters coming back in.

Steps:

Prevent automatic Windows driver updates. Well described here! Note that this is written for Windows 7, but works fine for Windows 8.1 too.

Windows 10 is more problematic, see this: How to Uninstall and Block updates and drivers

Install older driver. Now got to this page: Prolific USB To Serial Driver Fix! and install the relevant 32 or 64 bit driver.

Windows 64-bit Fix for:
– All Windows 64-bit operating systems including Windows 10
.Prolific USB to Serial Adapter .
.Device using PL-2303 H/HXA/HX/X version chips
.Supported device ID and product strings: . VID_067B&PID_2303 for “Prolific USB-to-Serial Comm Port”

1. Download and Save the PL2303 Installer Program here:IMG_4664

http://www.ifamilysoftware.com/Drivers/PL2303Installer/ PL2303_64bit_Installer.exe

You can just Save it to your Desktop to make things easy.

2. Unplug all USB-To-Serial adapters and Double click on the installer “PL2303_64bit_Installer.exe”

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

4. Reboot your computer. That’s it!

Windows 32-bit Fix for:IMG_4663
– All Windows 32-bit operating systems from XP up
.Prolific USB to Serial Adapter .
.Device using PL-2303 H/HXA/HX/X version chips
.Supported device ID and product strings: . VID_067B&PID_2303 for “Prolific USB-to-Serial Comm Port”

1. Download and Save the PL2303 Installer Program here:

http://www.ifamilysoftware.com/Drivers/PL-2303_Driver_Installer.exe

You can just Save it to your Desktop to make things easy.

2. Run the installer program. If it offers a choice to remove the driver, then select to remove the current bad driver. Then run the installer again to install the correct driver.