This often happens with older Prolific cables on Windows 10 or 11. You may need to "Roll Back" to an older driver version (2008 or 2011). Check Your Cable:
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Right-click the downloaded setup file and select . Follow the on-screen prompts and click Finish . Restart your computer. This often happens with older Prolific cables on
Before downloading anything, you need to find out what hardware is actually inside your USB interface. The easiest way to do this is by checking the via Windows Device Manager. Step-by-Step Chipset Identification Connect the USB interface to your computer. Press Windows Key + X and select Device Manager . awm usb interface drivers download