Search All Prolific USB to Serial Port Drivers Uploader Notes Under WinXP, I launched Device Manager, right clicked the USB to serial device that had a yellow exclamation mark, hit 'Update Driver'.

There are a number of products on the market in the USB to serial range of products. Prolific is the largest market holder currently. The issues which arrive with the Prolific Comm port Driver is that it tends to install like the old software modems. You first need to uninstall the current driver, then install the USB to Serial driver then the Port or Comms driver.

Comm Port Test

The issues are as follows:

1. Most times people don’t discounted the cable before installing the driver;

2. You need to uninstall any drivers for the USB to Serial currently on the computer;

3. Install the Device driver first before you install the Port or Comm driver.

You will best find the installation step by step here. You can also find the drivers here.

See: Prolific USB to serial driver

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Prolific Usb-to-serial Comm Port Windows 8

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