Right-click “Prolific USB-to-Serial Comm Port (COM 5)”.Double click LPT and COM ports then locate the Prolific USB to Serial Driver and right-click it so you can select Update Driver.Launch “Device Manager” (press the Win +X shortcut and select “Device Manager”).Updating the Prolific USB-to-Serial driver may resolve the issue. A yellow exclamation mark next to the Prolific USB-to-Serial Comm Port driver is a clear indication that the driver is faulty. Using Device Manager is a safer way to update device drivers on your PC. Update your Prolific USB-to-Serial driver via Device Manager Try running a dedicated PC optimization tool to check the health of your PC and apply the necessary fixes. Is your computer running slow or suffering system glitches? If so, it may need maintenance. You don’t want to create new problems by installing incompatible device drivers. Once you find the driver, be sure to check if it’s compatible with your Windows version. If you have the required computer skills, you can go to the official Prolific website and search for the latest Prolific USB-to-Serialĭriver. How to fix Prolific USB to Serial Comm Port issues on Windows 11 Manually download the latest Prolific USB to Serial driver

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. 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.Ī frequent problem is that the software that is necessary to connect to the device does not work under modern operating systems such as Windows 11. 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.

What is the Prolific USB to Serial driver If this is a problem you have faced after updating to the new Windows 11 then we have some fixes for you. Prolific USB to Serial Driver not Working on Windows 11? Recently installed Windows 11 on one of my laptops and my programming cable stopped working after a security update.

Prolific usb to serial comm port yellow