Asus B150M-C D3 Manual page 42

Booting the system in DOS environment
Please select boot device:
E1:
USB DISK 2.0 (3824MB)
UEFI: (FAT)
Enter Setup
ISOLINUX 3.20 2006-08-26 Copyright (C) 1994-2005 H. Peter Anvin
A Bootable DVD/CD is detected. Press ENTER to boot from the DVD/CD.
If no key is pressed within 5 seconds, the system will boot next priority
device automatically. boot:
Welcome to FreeDOS (http://www.freedos.org)!
C:/> d:
D:/>
Updating the BIOS file
D:/> bupdater /pc /g
2-4
ASUS DVD-E818A6T
USB DISK 2.0 (3824MB)
and to move selection
ENTER to select boot device
ESC to boot using defaults
d:
bupdater /pc /g
D:
(4069MB)
Chapter 2: Getting started