Instruction:
http://www.msi.com/files/pdf/Win8_UEFI_BIOS_Update_auto_en.pdf
Here is the instruction how to prepare pendrive for flashing to win8 bios, but you can use bios for win7 instead and flash that method shown in pdf file. It works .
http://www.msi.com/files/pdf/Win8_UEFI_BIOS_Update_auto_en.pdf
Here is the instruction how to prepare pendrive for flashing to win8 bios, but you can use bios for win7 instead and flash that method shown in pdf file. It works .