So, if you change place of connection, you should manually set the driver to 3. FelixHitz replied on December 1, To solve this intellectual infringement – original Prolific company modified their newest drivers to render the counterfeit adapters unusable. Even vendors selling their “USB to Serial” adapters are baffled. This tool is for profs.

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For more informations and where to download this tool, take a look at this article: Click on properties, and get the details:. Reply Did this solve your problem?

PL2303 USB to UART Bridge Drivers (Windows)

Below installer seriial will remove all of the incompatible drivers — make a change so that Windows can never update the driver without your approval — and install the Usb serial pl2303 3. Follow the steps from the wizard to run the troubleshooter. Connect your device, choose the correct COM port, and select the baud rate.

The usb serial pl2303 above works, but only temporary. FelixHitz replied on December 10, This tool is for profs.


Download and install this latest version 3. The serail Version” must say “3. Hey, but Usb serial pl2303 can’t do that myself!!! Main cause of this issue is because the device you own contains a counterfeit “Prolific” chip China clone.

FelixHitz replied on December 1, Each time you turn your computer off, the pl23303 driver is reloaded due to windows auto-update or if you unplug and plug again the device into USB port. Sometimes, installing the latest version of drivers solve the problem, but in this case, this is the opposite. The “Driver Version” must say “2. The only problem with it, is that, it reload the latest driver when you plug the device on a never used USB port.

usb serial pl2303

Then run the installer again to install the correct driver. This confirms you need to install correct driver file.

USB Serial Adapter Drivers Page

Prolific will take proper and severe actions to cease and confiscate these counterfeit products. On the next windows, choose the second option “Look seerial a driver on usb serial pl2303 computer”. Run the Sirf Demo software.

Run the installer program. Available forum solutions to this problem are half-baked.

Hi Thanks for the information it works a treat. In reply to FelixHitz’s post on December 1, I have tested it and it work fine. And if you double-click on it, you will see: Usb serial pl2303 latest version doesn’t work anymore with old serrial, and you need to downgrade the driver. Hi, Thank you for posting your query on Microsoft Community.

And Windows 8, 8. Or contact our worldwide distributors for other cable product reference and chip samples. If your adapter was working prior to going to Usb serial pl2303 Update, you can lp2303 back” to the previous installed driver and all will be well once again.

I’m afraid that there is no usb serial pl2303 I don’t want to send my devices to trash because they are too old less than a year! Sorry this didn’t help.