[Elecraft] PC not finding KUSB port

[Dennis L. Haarsager]

I'm doing firmware updates this weekend, and my KX3 and PX3 went fine after
installing the device driver using the KXUSB cable and a laptop running
Windows 8.1 Pro 64-bit.  However, I'm trying to use the same laptop with an
earlier KUSB cable to update my K3 and P3.  The cable is one using the
Prolific chip instead of the FTDI chip.  My P3 utility program says that
the COM port is closed and I can't scan for vacant COM ports.  However, my
computer device manager says it's hooked up to a Prolific USB to serial
adapter on COM5. I've tried installing the driver twice as the USB to
Serial Adapter page in the utility Help section suggests. This laptop has
only one USB port and I'm using it rather than a hub.

I've successfully used this KUSB with a different laptop running Windows 7
64-bit, but unfortunately my wife has it with her on a month-long trip to
Scotland.  Any suggestions would be appreciated.

73,
​
​

Dennis L Haarsager,
​N7DH​