| Error Message | Solution | |---------------|----------| | "This program is not compatible with your OS" | Ensure you have the 64-bit version. Check Windows version (Home vs Pro). | | "Failed to load driver. Error code 39" | Disable driver signature enforcement temporarily: bcdedit /set testsigning on | | "Cannot find hardware. Port in use" | Close other serial monitor tools (PuTTY, RealTerm). Reboot device. | | "Configuration file corrupt" | Re-download the .cfg file. Validate checksum. | | "tecsetup.exe has stopped working" | Run Windows Compatibility Troubleshooter (set to Windows 8 mode). |
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If Windows shows "Windows cannot verify the publisher," click "Install this driver software anyway" (only for trusted sources). | Error Message | Solution | |---------------|----------| |