The uBitx uses a clone nano and the serial/USB chipset CH340.
In Windoze 10, open Device manager and right click the unusable/unwanted Parallel port LPT3 and delete it.
Download the CH340 USB serial driver and run it.
Plug in the ubitx and Windoze should install the correct driver.
If it still doesn't work, maybe try editing the Windoze registry and remove all com ports...
A reboot may help (it's Windoze after all).
Nigel.
