How to flash the BIOS for MSI Motherboard?

WARNING!!!!!
DON'T FLASH WHEN YOUR SYSTEM IS RUNNING FINE!!!!
DON'T FLASH IF YOU DON'T KNOW WHAT YOU ARE DOING!!!!

Flash AMI UEFI BIOS by USB Disk Under DOS Mode

Know your model number
a. Open your case and look for the MS-XXXX number and the version number on the motherboard between the PCI slots

b. Boot up your system & press "delete" key to enter BIOS screen to double confirm BIOS version.
Download the BIOS that matches your motherboard and version number to your USB device.
Extract the BIOS-zip file that you have downloaded and paste it to your USB storage device
(Note: Make sure that your USB is bootable).
Boot your system from a USB storage device
When you get the DOS prompt, execute the following sequence:
Reboot your system when prompted
After bios update is done, C: prompt will appear on your screen.

Know your model number
a. Open your case and look for the MS-XXXX number and the version number on the motherboard between the PCI slots

b. Boot up your system & press "delete" key to enter BIOS screen to double confirm BIOS version.
Download the BIOS that matches your motherboard and version number to your USB device.
Extract the BIOS-zip file that you have downloaded and paste it to your USB storage device.
Press "delete" key to BIOS, select "Utility" and select "M-Flash".
Click "Select one file to update BIOS"
Select USB storage that comes with the downloaded BIOS.
(below shows the USB storage device use for bios update).
Select BIOS which you want to update and press "Enter".
After finish updating BIOS, the system will auto reboot.