Step 1. Format your USB disk to FAT 32
Step 2. Download the EC firmware files from Dropbox link to the desktop
Step 3. Save these firmware files to your USB disk
Step 4. Insert the USB disk to the mini pc and keep pressing “F7” on the keyboard access bios menu when the mini PC power up
Step 5. Choose "UEFI: Built in EFI SHELL" and it will start run automatically. After done,it will show successfully on the screen,then pull out the power adapter and connect again to restart the pc.

Dropbox link：
[ Ссылка ]

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