#Prolific usb to serial driver 3.4 how to#
#Prolific usb to serial driver 3.4 install#
#Prolific usb to serial driver 3.4 drivers#
#Prolific usb to serial driver 3.4 driver#
#Prolific usb to serial driver 3.4 upgrade#

#Prolific usb to serial driver 3.4 driver#

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.

#Prolific usb to serial driver 3.4 drivers#

What aggravates this issue is that there are many 'Prolific Driver Removal Tools' that do not work properly!ДЄnd 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.

#Prolific usb to serial driver 3.4 install#

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 3.4.62.293В will notВ work with most adapters and therefore issues the generic 'Code 10' error. Unfortunately this decision also renders all earlier adapters inoperative. To combat this, original Prolific company made changes to their newest drivers to render the counterfeit adapters unusable. The counterfeit chip use the same Vendor ID (VID_067B)В and Product ID (PID_2303)В as the authentic Prolific chips. Main cause of this issue is because the device contains a counterfeit 'Prolific' chip (made in China).

Even companies selling these USB to Serial adapters are confused. Internet is filled with pages discussing this problem - but no one seems to know what causes it. 'Device driver was not successfully installed'.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.)ДЄnd if you double-click on it, you will see: (Notice in above pic, yellow triangle next to 'Prolific USB-to-Serial Comm Port (COM X)'. In summary, this article is for: Windows XP, Windows 7, Windows 8, Windows 8.1 and Windows 10! Works on 32/64-bit.ДЄnd it addresses issue of: Prolific PL-2303 Driver Fix (VID_067B&PID_2303)Дriver issue will show inside your Device Manager like this:

#Prolific usb to serial driver 3.4 how to#

Purpose of this article is to guide you on how to FIX the 'Prolific USB-to-Serial'В driver issue with common cheap units. The only problem with it, is that, it reload the latest driver when you plug the device on a never used USB port.Posted by Alex E. It allow to inhibit the auto-update for a particular program or driver (Prolific in our case).For more informations and where to download this tool, take a look at this article:I have tested it and it work fine. It's a tool namedwushowhide.diagcab ('Show and Hide Update'). Each time you turn your computer off, the latest driver is reloaded due to windows auto-update (or if you unplug and plug againthe device into USB port).To avoid that, a recent turnaroundВ exist and has been published by Microsoft. Once manually set, the device driver remain in the 3.3 release.Tested on W10 family and pro, 32/64 bits.The solution for old PL-2303 HXA/X: use a driver release older than 3.4.Edit: The procedure above works, but only temporary.

It don't care,because the old version is now available in the list, and you can proceed as mentioned above. If you watch the configuration panel, you will see the COM port coming OK, but then switch off because of error 10. To downgrade, use the configuration panel, choose COM and LPT and right click: the first choice shouldbe 'update driver' (or something similar: sorry, but I've the French version, and hope my translation is understandable).

#Prolific usb to serial driver 3.4 upgrade#

Click onproperties, and get the details:the version driver (ser2pl.sys or ser2pl64.sys) should be something like 3.6.78.350but this one doesn't work anymore with old PL-2303 hardware.Sometimes, installing the latest version of drivers solve the problem, but in this case, this is the opposite.The latest version doesn't work anymore with old hardware, and you need to downgrade the driver.If you have previously used the PL-2303 (with W7) and upgrade to W10, it's simple because the previous versions of the drivers are still on your computer. You can check it, using the configuration panel: watch the COM and LPT section, you should have the 'Prolific USB-to-Serial Comm (COM X)'. FOUND THE SOLUTION!Indeed, when installing W10, the device driver for PL-2303 is the latest version.