Do I need to install BIOS?

You will need the version of the BIOS for your exact hardware. … If your computer loses power while flashing the BIOS, your computer could become “bricked” and unable to boot. Computers should ideally have a backup BIOS stored in read-only memory, but not all computers do.

Should I update BIOS first or drivers?

Generally, you don’t install chipset drivers until AFTER you have installed the OS. I would recommend that you download the latest specified chipset drivers onto a USB drive or CD/DVD.