deutsch 1. Preparation - Create a safe environment for a BIOS-Update

It is very important to create a safe environment before starting a BIOS update.

  • Identify the installed BIOS version:
    The version number and date of the installed BIOS version can be identified relatively easily. If you're not sure, then take a look in the download section on the manufacturers website of your Brand PC, Notebook or Motherboard, to find the BIOS version and BIOS date:

    AMI Bootscreen

    AWARD Bootscreen

    PHOENIX Bootscreen

    Tip: press the PAUSE key to stop the scrolling boot screen.
  • Identify the mainboard manufacturer, type and version:
    This is most often only required if you have bought the mainboard in its original box:

    Manufacturer: ASUS
    Type: M2N32-SLI Deluxe

    Revision 1.03G

    Manufacturer: MSI
    Type: 790FX-GD70 (MS-7577)

    Version 1.0

    On a Brand PC or Notebook you will need instead the model name and serial number, which you can most often find on a sticker on the PC case.
  • Download the BIOS-Update files
    From which location do i get the BIOS-Update file and flashtool?
    - If you have bought the mainboard in its original box: mainboard manufacturer website.
    - If you have a notebook or brand PC: notebook/brand PC manufacturer website.

    This is a very important decision, because your PC will not work with a wrong BIOS version!
    Watch out for so-called OEM-Mainboards !
  • Rename BIOS-Update files: if you intend to update your BIOS with a bootable USB-Stick/Diskette/CD under DOS, you have to rename the BIOS file and flashtool filename (not the filename extension!) when the filename has more than 8 characters! Reason: see 8.3
  • Create a Backup: if your manufacturer does not have your current BIOS version on his website. Use the backup function of your flash software, if you are using a rewriteable medium like USB-Stick, Diskette, or Hard disk (with FAT16/FAT32 partition).
  • Save current settings: write down or take a picture from your current BIOS-Setup settings if you have changed the default settings, because you will lost these settings during the BIOS update.
  • Load default settings: make sure that your PC is not overclocked and disable all tuning settings. Load the default BIOS-Setup settings, called: "Load Bios Defaults" , "Load Setup Defaults" , or "Safe Settings".
  • Remove write protection: some mainboards have jumpers to protect before erroneously flashing the BIOS. The jumper position is most often nearby the BIOS-Chip. There should be a layout plan in your mainboard manual, which shows the position of your Bios-Chip and the jumper. Other mainboards have a BIOS-Setup option called "Flash Bios Protection", "Firmware Write Protect", "Bios Guardian" or "BIOS-ROM Flash-Protect", which must be disabled.
  • Stop Anti virus scanner, etc.: close all programs (Email clients, AV scanner, Firewalls, Office programs, etc.) which could disrupt Windows or the flash program.



 1. Preparation - Create a safe environment for a BIOS-Update
 2. Choose BIOS-Update method DOS, Windows or per BIOS-Setup?
 3. Start the BIOS-Update Flash your BIOS chip
 4. BIOS Update failed? First aid


Attention: this Howto describes only a BIOS update according to standard, how it should work on most mainboards with AMI-BIOS, AWARD-BIOS or PHOENIX-BIOS. I cannot guarentee that it will work on your PC and I assume no liability for any damages! Please read the README files from your Mainboard manufacturer or PC manufacturer.

User-Comments: 1. Preparation

Einträge: 4

Williams 12.Feb.2022 21:04

I need to understand about all bios and it's programming

biosflash 16.Feb.2014 15:44


akhilesh 16.Feb.2014 12:49

your content is good. my question is when i insert my pendrive for boot bios not recognise it. one i press F8 its show & boot but not accept any command. i have some problem. plz send me details. thank you

Carlos 3.Jan.2012 02:06

Very informative.