Download this tool
, install it and then run it. Select FAT32 and tick the \"Create DOS Startup Disk\"-Box like on the following picture:Download this Archive
, unpack the DOS-Files it includes into a folder of your choice and then point the HP-Tool to those files. Your USB Flash Drive should then be bootable.
When you are done with the HP-Tool, download the latest BIOS-Archive from here:http://eu.msi.com/index.php?func=downloaddetail&type=bios&maincat_no=1&prod_no=1373
...and copy the following files into the root directory of your USB Flash Drive: A7380NMS.130
(=BIOS-File) and AFUD4234.exe
(AMI Flashing Application).
Once you are done with that, restart your system and force it too boot from your USB Flash Drive. When you reach the DOS Command Prompt type the following command:AFUD4234 A7380NMS.130 /P /B /N /C
That will initiate the flashing procedure. When the BIOS is properly flashed, turn off your system, unplug the A/C power cable from your PSU and clear CMOS.
That is it (basically).
Remember, the risk is yours and yours alone.