Hey guys! I have a question for you. I have a modded bios for my laptop, with an .fd extension. A guy that modded it, posted a tutorial for emergency flashing, which includes removing a battery, AC adapter... Can I flash an bios with .fd extension, in DOS mode. I've managed to set it all up on my USB flash drive. I have an Insyde 2.13 BIOS. In DOS, I entered: First one is a BIOS package I downloaded from an manufacturer official site. Second one is the modded BIOS. This didn't work however, and it responded with a error: This modded BIOS has 4 mb. I also have an "de-capsulated" BIOS file with the same name, this one however has 8 mb. Which one should I use and how? Can this be done in DOS, or do i have to follow the recovery procedure? My current BIOS is working properly, but I need to change advanced options, in order to install an older OS. Thanks in advance guys!