Tag Archives: bios

Downgrading ASUS Notebook BIOS

As I mentioned on my previous post about high CPU usage by audiodg.exe, I highly suspected that the culprit is because I upgrade my ASUS Notebook BIOS. So, here I’ll show you how to downgrade your Asus Notebook BIOS.

Asus Notebook has two way of upgrading/downgrading your BIOS. One way is using EasyFlash via BIOS boot screen and another way is using WinFlash utility. I’ll use WinFlash in this tips. Why? Because I can’t take BIOS boot menu screenshot ­čśŤ

WinFlash can be found on your Notebook CD driver companion or from Notebook Asus driver download page.

asus a43sv

Normally, WinFlash would not let you downgrade your BIOS. You’ll get warning and can’t click on “Flash” button. So, we need “unusual” way to start WinFlash utility

  • Make sure your Notebook battery is fully charged or connected to powerline.
  • Open Windows “Run” window by invoking Win+R. Type cmd there. It will open Windows command prompt.
windows run

run cmd

  • cd” to where you install WinFlash utility, usually on “C:\Program Files (x86)\ASUS\WinFlash
  • type this command: WinFlash.exe /nodate
  • See this screenshot for all above commands.
windows run asus winflash

How to run WinFlash via command line

  • The WinFlash window will be opened.┬áClick OK
asus winflash from command line

WinFlash window opened via command line

asus winflash choose bios file

Choose downloaded BIOS file

  • You’ll still get warning about the BIOS you want to Flash is older than the currently installed. But, now you can click on “Flash” button.
asus winflash warning old BIOS

warning from WinFlash

  • Now click on “Flash” button. Flashing will start. After that, you can click on “Exit”. Windows will shutdown automatically.

There you have successfully downgraded your Asus Notebook BIOS!

Tested on: Windows 7 64bit, Notebook Asus A43SV, BIOS Revision 317 downgrading to Revision 314

audiodg.exe high cpu usage

This problem happened after I upgraded my ASUS A43SV BIOS. Suddenly, my Windows 7 is getting slower and slower when playing any sound (including Windows 7 system sound notification). Checking on Process Explorer, it is audiodg.exe that eat most of the CPU power and the Windows application that need to play sound. Even playing music with foobar2000 slow down Windows 7, not to mention when you are playing Youtube video using Firefox (Firefox + Flash + audiodg.exe = snail speed Windows).

windows normal audiodg.exe

normal audiodg.exe

(I can confirm it is BIOS problem because I do dual-boot and my Ubuntu also slowed down)

Of course I can downgrade my BIOS into recently working BIOS, but I’m looking for more “generic” solution.

So here it is:

  • right click on your “Speakers” on your Windows 7 tray icon
  • windows speakers right click menu

    right click on Speakers icon

  • Choose Playback Devices
  • New window will open. Double click on your playback device that has green checkmark
  • windows list of active sound playback devices

    Default playback devices. Double click it.


  • Choose “Enhancements” tab
  • click on “Disable all sound effects
  • windows playback devices disable enhancements

    Disable all sound enhancement

  • Click OK
  • reboot your Windows 7 (I don’t know if this last step┬ánecessary┬áor not)

Tested on: Windows 7 64bit, ASUS A43SV, official BIOS version K43SVAS.317

If this trick doesn’t work, you can always easily downgrade the BIOS using WinFlash utility from ASUS.