| Error Message | Likely Cause | Solution | | :--- | :--- | :--- | | "No Device Found" | USB driver not installed correctly | Re-run the CH340 driver installer manually. | | "Setup Wizard Crashed" | Antivirus blocking the .exe | Temporarily disable Windows Defender or third-party AV during install. | | "Language Files Missing" | Corrupted CD or incomplete download | Copy the entire CD contents to your Desktop, then run setup from there. | | "COM Port in Use" | Another program (e.g., Arduino IDE) is using the port | Close all other USB serial software. Restart your PC. |
Skipping the wizard or using a generic setup results in >40% error margins. Following the process reduces error to <2%. quantum resonance magnetic analyzer 4 430 setup wizard top