PL2303 DRIVER WINDOWS 11 INSTALL

Follow the on screen prompts to install the Prolific serial drivers and when completed the serial adapter should be assigned a COM port number.

It may also be possible to disconnect the computer from the internet to prevent this from happening. This must be done quickly after Step 8 to prevent Windows from automatically reinstalling the newest driver version.

Navigate to the extracted files from Step 2 and run вЂњPL2303-Prolific_DriverInstaller_v1200.exeвЂќ.

Click on the вЂњUninstallвЂќ button to proceed.

Right-click on the entry вЂњPlease install corresponding PL2303 driver to support Windows 11 and further OS.вЂќ and select вЂњUninstall deviceвЂќ.

Expand the вЂњPorts (COM & LPT)вЂќ section.

Open the Device Manager (right-click) on the Start Menu and select вЂњDevice ManagerвЂќ.

Connect the USB to Serial adapter to the computer.

Extract the contents of the zip file downloaded in Step 1.

Download the legacy driver 1.20.0 from the download page here.

It appears that Windows kept reinstalling the driver no matter how many times it was uninstalled. Unfortunately, their recommended instructions for uninstalling the current driver and installing the older version in its place did not work. Surprisingly, the newest driver does NOT work on Windows 11вЂ¦ but an older version from 2018 doesвЂ¦? It turned out to be a driver issue: Prolific, the manufacturer of the chipset used by several USB to Serial adapter brands, has yet to publish a driver for Windows 11. We discovered this issue because a Java program stopped communicating with an oscilloscope using an USB to Serial RS-232 cable after updating to Windows 11.

Pl2303 driver windows 11