Arduino Nano Driver Windows 10 Review

| Problem | Cause | Solution | |---------|-------|----------| | | 64-bit driver on 32-bit Windows (or vice versa) | Use official CH341SER.EXE (auto-detects architecture) | | Code 10 (Device cannot start) | Corrupt driver or USB port power issue | Uninstall driver → disconnect Nano → reboot → reinstall → try different USB port | | Code 28 (Driver not installed) | Windows blocked unsigned driver | Disable driver signature enforcement or use latest signed CH340 driver (2020+) | | Arduino IDE cannot upload | Wrong COM port or bootloader timing | Select correct COM port in Tools → Port. Retry upload just after resetting Nano (press reset button before upload) | | Port appears but disappears immediately | Power-hungry sketch or short circuit | Remove all connections from Nano, reinstall driver, test bare board |