Arduino Nano Driver Windows 10 Jun 2026

Pro Tip: If you bought a "Nano V3.0" for under $10, it is almost certainly using the CH340 chipset.

The Arduino Nano, especially older versions and third-party clones, often requires manual driver installation on Windows 10. While modern Nanos (official, with new bootloaders) typically use the standard USB-serial driver usbser.sys , most clones rely on or CP2102 USB-to-UART chips. Windows 10 does not automatically download CH340 drivers, leading to "Unknown USB device" errors. This report details identification, installation, and resolution of common issues. arduino nano driver windows 10