Do not turn off your computer or disconnect from the power source while updating the BIOS as this could harm your computer. During the update, your computer will restart and you may briefly see a black screen.

Before updating, please read the installation instructions and important information noted below.


Restart required
XPS 8500,VOSTRO 470 A09 BIOS for Windows 8
To view all drivers for your Vostro 470, go to Drivers and downloads.
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File Format: Flash BIOS executable
File Name: A09.EXE
File Size: 7.52 MB
Format Description
This file format consists of a BIOS-executable file. To use it, download the file and copy it to a DOS-bootable USB flash drive, then boot the system to the USB flash drive and run the program.
To ensure the integrity of your download, please verify the checksum value.

Fixes & Enhancements

1. Fix that BIOS will show no boot device when booting into Windows 8 without keyboard attached.
2. Update ePSA to 4220.10.
3. Fix M117N graphics card can't enable secure boot and UEFI boot menu show half logo in screen.
4. Fix RTC wakeup function will fail after AC lose.
5. Fix Some PCIE1X cards can't be detected
6. Update IvyBridge UEFI video BIOS to
7. Update SandyBridge UEFI video BIOS to
Read More


A09, A09

Release date

25 Sep 2012

Download Type

System BIOS




Dell Technologies recommends reviewing this update to determine if it applies to your system. The update contains changes that impact only certain configurations or provides new features that may or may not apply to your environment.

Additional details

Show All | Hide All
A1411 Jul 2018
A1302 Apr 2018
A1229 Oct 2013
A1124 Jul 2013
A1002 Mar 2013
A0615 Jun 2012
A0516 May 2012
A0330 Apr 2012
Dell XPS 8500 / Vostro 470
1. Boot into Windows.
2. Copy A09.EXE onto your desktop.
3. Execute A09.EXE by double click it.
4. Click Update when BIOS Update Program dialogbox pop up.
5. Make sure you don't interrupt the update process.
6. Do not turn off power or disconnect AC power source before update complete.
7. Press Yes to confirm the BIOS version you want to update and to start BIOS Update process.
8. Press Yes and then system will restart after BIOS update complete.

Reboot will be required

Need help with BIOS issues?

Find a solution in Dell's BIOS troubleshooting and usage guide.

Drivers help and tutorials