Coming into this late. I have the USB driver files from the Yaesu website. I run the installation program, CP210XVCPInstaller_x64, on my WIN10 computer and they install without any errors. I follow the instructions doing just what Yaesu says to do and when. I connect the USB cable to my unpowered FT3K and to the USB port of my computer. Yaesu instructs me to then turn on the FT3K. I do that. According to the instructions, I should see the computer installing the device drivers. NOTHING. I have verified the cable is good. I have verified the port on the computer is good. I have tried this on another WIN10 computer and get the same results. NOTHING. I had this same software running a year ago on a WIN7 computer.