MSI PRO B550-VC AM4 ATX Motherboard - Manual (Page 55)

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UEFI BIOS
M-FLASH Menu
M-FLASH provides the way to update BIOS with a USB flash drive. Please download
the latest BIOS file that matches your motherboard model from MSI website, save the
BIOS file into your USB flash drive. And then follow the steps below to update BIOS.
1. Insert the USB flash drive that contains the update file into the computer.
2. Click on M-FLASH tab, a demand message will be prompted. Click on Yes to
reboot and enter the flash mode.
3. The system will enter the flash mode and a file selection menu will appear after
rebooting.
4. Select a BIOS file to perform the BIOS update process.
5. After the flashing process is 100% completed, the system will reboot
automatically.