The LKT20 was legendary among people like David. It was robust, precise, and absolutely allergic to modern operating systems. It had been designed for Windows XP, maybe early Windows 7, back when drivers were written by humans, not generated by wizards.

If the device shows as "Unknown device" or "USB 2.0 Ethernet" with a yellow exclamation, Windows 10 could not match an in-box driver.

If you’ve followed this entire guide and still see the error “This device cannot start (Code 10)”, consider buying a modern (e.g., from TP-Link or Panda) that natively supports Windows 10 without driver headaches.