Prolific USB To Serial Driver Fix!
Windows 32 and 64-bit Operating Systems - Prolific PL-2303 Driver Fix (VID_067B&PID_2303)
For Windows XP, Windows 7, Windows 8, Windows 8.1 and Windows 10!
"This Device cannot start (Code 10)"
"No driver installed for this device"
"Device driver was not successfully installed"
The Internet is full of web pages discussing this problem, but no one seems to know what causes it. Even the companies selling these USB to Serial adapters appear to be dumfounded.
What has happened is that there have been counterfeit "Prolific" chips coming from China. The counterfeit chips use the same Vendor ID (VID_067B) and Product ID (PID_2303) as the authentic Prolific chips. So, Prolific made changes to their newest drivers to render the adapters using counterfeit chips unusable. Unfortunately, it renders all earlier adapters inoperative and so you have to go out and buy new ones. Planned obsolescence? Getting a working driver installed by the average user is almost impossible.
The Prolific 64-bit drivers that Microsoft supplies via Windows Update, Versions 188.8.131.525, 184.108.40.206, 220.127.116.11, and 18.104.22.1683 will not work with most adapters and issues the generic "Code 10" error. Or, you may get no error at all, but your device will 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 aggravates the issue is that there are many "Prolific Driver Removal Tools" that do not work properly as well! 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. Yes, it's frustrating as hell.
The only 64-bit driver I have ever found that works with all the "Prolific" adapters is Version 22.214.171.124. The below installer program will remove all of the incompatible drivers, make a change so that Windows can never update the driver without your okay, and install the Version 126.96.36.199 compatible drivers.
64-bit Fix for:
Download and Save the "PL2303_64bit_ Installer.exe" at the link below:
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!
Shooting: You must follow ever step in the process precisely. If you still
receive an error after running the PL-2303_64bit_Installer.exe and your device
is plugged in, go to the Windows 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 "188.8.131.52"
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.
32-bit Fix for:
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.
Removal: The Prolific 32-bit PL-2303_Driver_Installer is a "Program" file and therefore installed to your computer and must stay. If you want to delete it, use the Windows "Uninstall a Program" or "Add or Remove Program" feature, however this will also uninstall the driver itself.
words: Sabrent, SBT-USC1M, Prolific, PL-2303, USB to Serial, VID_067B, PID_2303,
Copyright 2014, Family Software. All rights reserved.