never flash a bios in windows. make sure have the correct file for your MB MODEL and REVISION for most people confuse with bios version due to rev. has different chips on motherboard
need to look on MB for Rev.x,xx also what OS 32 or 64bit ?
make a bootable USB stick (fat32) with no autoexe.bat,config.sys
if this is correct MB and Rev. listed above
Z68 ITX A-E.zip extract to folder C:/EFI/, will make a folder PA198
C:\EFI\PA198\1110 folder with updated bios file I1011NZT.ROM and this ZTEFUDOS from efudos folder put these on USB.
ok with files on stik set bios to boot from usb boot with stik just made get to dos prompt
type
ZTEFUDOS yourBIOS.ROM
do not loose power or interupt process