I have an older Prolific serial to USB converter. It would not work with my Windows 10 operating system. After updating the driver it still would not work. I found a solution by backdating the driver to an earlier version. The link below will take you to the Milkor.com website. Follow the instructions to download and install the 3.2.0.0 64bit driver. http://www.miklor.com/COM/UV_Drivers.php
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