1. DOS mode:

Please follow the below steps to update BIOS:
 
      Step 1: Please make a new folder "c:\bios" and download DOS.zip file to this folder.
      Step 2: Choose DOS.zip icon and use mouse right key to select "Extract All..." to decompress this file to this folder.   
      Step 3: Create a bootable disk.
      Step 4: Insert the bootable disk into floppy drive (or external USB floppy drive) and power on 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 EG115.bat to update BIOS in DOS mode

2. Windows Mode

Please follow the below steps to update BIOS:

   Step 1: Please download Windows.zip file to Windows desktop.
   Step 2: Choose Windows.zip icon and use mouse right key to select "EXtract All..." to decompress this file.   You will get  Aspire_1520_v115.exe. 
   Step 3: Execute  Aspire_1520_v115.exe and follow the instructions to update BIOS.
