Please follow the below steps to update BIOS:

1. DOS mode 
Step 1: In Windows mode , please make a new folder "c:\bios" and download bios 1.18.zip file to this folder.
Step 2: Extract bios 1.18.zip under this folder. 
Step 3: Get/create a bootable disk.
Step 4: Insert the bootable disk into floppy drive (or external USB floppy drive) and reboot the system. 
Step 5: Press <F2> to enter BIOS setup, choose [Boot] on the top menu, follow the instructions to select "Floppy Drive" as first boot device, then save setting and reboot. Please make sure to enable [Legacy USB Support] in Advanced page if you use external USB floppy drive.
Step 6: Go to directory "c:\bios" and execute the batch file BOL118.bat to update BIOS in DOS mode

2. Windows Mode
Step 1: Please download bios 1.18.zip file to Windows desktop.
Step 2: Choose bios 1.18.zip icon and use mouse right key to select "EXtract All..." to decompress this file. You will get BOL118.bat. 
Step 3: Execute BOL118.bat and follow the instructions to update BIOS.