I would suggest you to run Hardware and device troubleshooter and check if it helps: It don’t care, because the old version is now available in the list, and you can proceed as mentioned above. I got to the screen to select updates to be blocked, but the usb to serial was not an option. The only problem with it, is that, it reload the latest driver when you plug the device on a never used USB port. The latest version doesn’t work anymore with old hardware, and you need to downgrade the driver. RobbieAitkenhead replied on December 10, Download drivers from Prolific site.

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If you have previously used the PL with W7 and upgrade to W10, it’s simple because the previous versions of the drivers are still on your computer. Connect your device, choose the correct COM port, and select the baud rate.

USB Serial Adapter Drivers Page

Sometimes, installing the latest version of drivers solve the problem, but in this case, this is the opposite. RobbieAitkenhead replied on December 10, To solve this intellectual infringement prolifid prolific usb to usb Prolific company modified their newest drivers to render the counterfeit adapters unusable. StanP12 replied on December 16, How do I fix it? What worsens this issue is that there are many “Prolific Driver Removal Tools” that do not work prolific usb to usb.


Follow the steps from the wizard to run the troubleshooter.

On the next windows, choose the second option “Look for a driver on my computer”. This tool is for profs. Available forum solutions to this problem are half-baked. You must prolific usb to usb ever step in the process in exact order. This confirms you need ueb install correct driver file.

PL CheckChipVersion tool program. I don’t want to send my devices to trash because they are too old less than a year!

Launch this program, it will install the driver. And it addresses issue of: Download drivers from Prolific site. If it offers a choice to remove the driver, then select to remove the current “bad” ussb. I have the same question Then run the installer again to install the correct driver. Issue will also may show messages like this: Even vendors selling their “USB to Serial” prolific usb to usb are baffled.

Please be warned that selling counterfeit products are illegal and punishable prolific usb to usb civil and criminal courts according to the trademark, copyright, and intellectual properties laws and regulations. If not, then the correct driver is not installed.


Another windows appear, and select the bottom option: KB I have tested it and it work fine. May be, a solution will be to use the old W7 drivers version into W Click on Hardware and Sound, click on Hardware and Devices.


Of course, you can try to manually update the driver at Prolific site: Prolific usb to usb can check it, using the configuration panel: Later version, like 3. And Windows 8, 8. June 1, Applies to: For more informations and where to download this tool, take a look at this article: