Do not rely on Windows Update. Download official or trusted drivers:
If the port appears briefly and then vanishes, – it means the preloader is active, loads the DA (Download Agent), then hands over to the main flash process. error mediatek driver not detected mct
Poor-quality cables, USB 3.0 ports (especially blue ones), or front-panel ports often cause handshake failures. MediaTek preloader is sensitive to USB timing. Do not rely on Windows Update