basically after you create a dos bootable usb, copy all content in Modified Bios and Flash Utility folder to the usb. then boot up via usb, flash with F.BAT.
Request BIOS Request BIOS in DOS -Manufacturer: Fujitsu -Motherboard Model: FJNB1ED (Model: Fujitsu Lifebook A6210) -Bios revision: 1.15 -Bios Type: PHOENIX BIOS -Bios Download Link