Download Dell Inspiron 17 5721 System BIOS Update A09 for Windows/DOS

To start downloading Dell Inspiron 17 5721 System BIOS Update A09 for Windows/DOS, please choose one of the links from the list below.

  1. Inspiron 17 5721 System BIOS Update A09: 5721A09.exe

Run the BIOS update utility from Windows environment

  1. Browse to the location where you downloaded the file and double-click the new file.
  2. Windows System will auto restart and update BIOS while system startup screen.
  3. After BIOS update finished, system will auto reboot to take effect.

Run the BIOS update utility from DOS environment (Non-Windows users)

NOTE: You will need to provide a bootable DOS USB key. This executable file does not create the DOS system files.

  1. Copy the downloaded file to a bootable DOS USB key.
  2. Boot from the USB key to the DOS prompt.
  3. Run the file by typing copied file name where the executable is located.

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If you have found mistakes during downloading, please email to We will endeavour to solve these as soon as possible. Other problems, please try to contact publisher's official support.

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