These are generally more reliable as they auto-install drivers on most modern Windows systems. RT Systems and various eBay sellers offer these for the PX-777.

: Can be downloaded or ordered as a kit with a USB-K4Y cable from the RT Systems PX-777 product page : Also available through specialized outlets like DX Engineering Off Grid Gear 2 Go Requirements for Programming New Model #4853: Puxing PX-888 - CHIRP

: Many vendors on platforms like Hi-Radio or Amazon suggest contacting them directly for a download link if you purchase the radio or a programming cable from them. 2. Required Hardware To connect your radio to a computer, you will need: CHIRP: Home