I know it is highly not recommended, but I just flashed mine in windows. Follow the instructions at DFI...update all and clear cmos being ticked is most important. Or go with the thumb stick. I only ever had one bad windows flash on many (say 30 attempts) at windows flashing. That time I tried an untested modded bios and the checksum was wrong....boom....brick! Completely my fault...never had issues with DFI released BIOS'