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


XPS 8500,VOSTRO 470 A09 BIOS for Windows 8

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


Version A09, A09



Release date

25 Sep 2012

Last Updated

22 Oct 2012


Available formats

File Format: Non-Packaged
File Name: A09.EXE
Download Type: HTTP
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.

By downloading, you accept the terms of the Dell Software License Agreement.

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.

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