While the "portable" USB flash method is the most reliable and robust, ECS provides other, more user-friendly options for updating the BIOS.
Select the USB drive and follow the prompts to flash the new firmware. ecs h61h2mv bios update portable
The Complete Guide to ECS H61H2-M? (H61H2-MV) BIOS Updates and Portable Flashing While the "portable" USB flash method is the