Other problems can include using an improper cable, incorrect port settings, or a basic incompatibility between the Plugable USB serial adapter and the device it is being connected to. A frequent problem is that the software that is necessary to connect to the device does not work under modern operating systems such as Windows 7 or above. Although this usually works well, a number of problems can crop up because many of the devices people want to connect are older devices with various issues. The Plugable USB serial adapter allows you to connect legacy devices that use RS232 serial communications to computers that do not have a serial port. Originally authored by: David Roberts, December 9, 2013

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

Now extract the contents of the zip file downloaded in step #1, navigate into the extracted files and double-click on 'PL2303-Prolific_DriverInstaller_v1200.exe' to start the installtion process.

Repeat steps 5-7 until the 'Ports (COM & LPT)' section shows 'USB-Serial Controller D' with an error icon to the left.

When completed, right-click on any entry in the Device Manager and select 'Scan for hardware changes'.

Check the box to delete the drivers and then click on the 'Uninstall' button to proceed.

Right-click on the entry 'Please install corresponding PL2303 driver to support WIndows 11 and further OS.' and select 'Uninstall device'.

Open the Device Manager (right-click) on the Start Menu and select 'Device Manager'.Connect the USB to Serial adapter to the computer.

zip file to the Desktop or Download folders Download the legacy driver 1.20.0 from our download page here and save the.Prolific has not yet released a Windows 11 driver for the PL2303HXD chipset used in our USB to Serial Adapter, in the meanwhile we can install an older driver to enable this adapter on Windows 11 systems by performing the following:

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