Answer

Here are several steps as below for your reference:

1. Download the latest BIOS from MSI web-site.
2. Extract the BIOS file into a bootable USB flash drive or floppy disk.
3. boot from bootable USB flash drive or floppy disk into DOS without CONFIG.SYS and AUTOEXEC.BAT files.
4. Execute "flash.bat".
5. Reboot the system.
6. Press "Delete" key during POST into BIOS setup.
7. Load Optimal Defaults in BIOS setup then save changes and exit.