What is the listed in your tablet settings?

Check your device manager. If a yellow triangle appears, reinstall the MediaTek VCOM or Allwinner drivers. Try a different USB port (preferably USB 2.0). Stuck in a Boot Loop (Meberry Logo)

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Ensure the downloaded package matches your specific CPU (e.g., MT6739 or Allwinner variant). Step-by-Step Firmware Installation Guide

Run DriverInstall.exe as Administrator. Click “Install Driver”. Reboot your PC.