Downgrading BIOS versions on ASUS latops [GUIDE]

[Kiriya]

Dear Comrades.
I often encounter questions about downgrading a latop's BIOS to bring back useful THROTTLESTOP functionality.
Here is a solution for many ASUS models that have BIOS versions without locks.
Works on all Windows 10. Not tested on Windows 11.
It's very simple and takes about 5 minutes.

Turn on the laptop, remembering to connect the power adapter so that
the device does not accidentally turn off while installing the firmware.
Let's begin!

QUICK GUIDE.
1. Check C:\Windows\Firmware and delete all subfolders
2. Download the unlocked BIOS version
3. Download original updater - ASUS WinFlash and Install
4. Run WinFlash with attribute (/nodate)
Win+R - CMD - "C:\Program Files (x86)\ASUS\WinFlash\WinFlash.exe" /nodate
5. Downgrading with WINFLASH
Click NEXT - Get BIOS from Device - UPDATE - EXIT to REBOOT
FROM THIS POINT IT IS IMPORTANT... THAT YOUR
LATOP DOES NOT ACCIDENTALLY TURN OFF DURING
THE BIOS FIRMWARE PROCESS!!!
6. Laptop will reboot and Enter the BIOS.
Press YES - wait for its completion - laptop will reboot and start Windows.
7. Check BIOS version (WIN+R - msinfo32).
Check C:\Windows\Firmware and delete all subfolders.
8. THE END


FULL GUIDE.
1. Even if you yourself have not installed new versions of the BIOS, when installing or upgrade Windows downloads and installs the latest version of the BIOS.
First of all, you need to check C:\Windows\Firmware and delete all subfolders. Otherwise, when you reboot, the BIOS will return to the newer version.

2. Download the unlocked BIOS version for your notebook model (ASUS official website or other Internet resources).
You will have to find out which one by yourself by experience (you can update BIOS in this way an infinite number of times).
'My laptop ASUS ZENBOOK DUO PRO (UX581GV) has the latest unlocked BIOS version 305.'

3. Download original updater - ASUS Winflash (Use Google search) and Install
Default installation path C:\Program Files (x86)\ASUS\WinFlash.

4. Run WinFlash with attribute (/nodate).
(Otherwise, the program will not allow you to downgrade and will prompt you to exit the installation).

i. You can do this using the file manager like Total Commander
WinFlash.exe /nodate

ii. Or using the command line as an administrator (Search - cmd - Command Prompt - Run as administrator)
"C:\Program Files (x86)\ASUS\WinFlash\WinFlash.exe" /nodate

5. Downgrading with WINFLASH
Click NEXT - Get BIOS from Device (add your BIOS file from SSD/HDD) - UPDATE - wait some seconds - EXIT to REBOOT

FROM THIS POINT IT IS IMPORTANT... THAT YOUR
LATOP DOES NOT ACCIDENTALLY TURN OFF DURING
THE BIOS FIRMWARE PROCESS!!!

6. After pressing Exit, the laptop will reboot and Enter the BIOS.
Press YES button - flashing process will start - wait for its completion and don't touch anything - laptop will reboot and start Windows.

7. Check BIOS version (WIN+R - msinfo32).
Check C:\Windows\Firmware and delete all subfolders.

CONGRATULATIONS!!!
Arigato UNCLEWEBB for the gorgeous program ThrottleStop.

 

[olibub]

Hi, thank you for this post. It helped me to rollback bios to the earliest version and I got much better temps and performance. Thank you!

 

[Kiriya]

Hi, thank you for this post. It helped me to rollback bios to the earliest version and I got much better temps and performance. Thank you!

Welcome.

 

[tulius]

What if my Windows installation is totally broken? As of today I can't even log in because of Windows considers that many reboots are suspicious and asks me to have the machine up and running for 2 hours...something imposible because of it won't last more than 5 minutes until it has a Blue Screen....

 

[SkGod]

Hey,
Can I still downgrade bios? Because on their website they say that you can't downgrade your bios. I wanted to do it because my bios got updated when I upgraded to windows 11 and I faced alot of problem regarding internal graphics. As my laptop have nvidia optimus and can't disable igpu, the only way to fix my laptop is downgrading bios (as much as I know). I have tried everything to revert the laptop back to what I originally got. But the only thing left was bios and I think it's the only culprit.
Some issues were:
Black display(sometimes backlit is on and sometimes off)
I manage to boot it up by moving the laptop lid up and down and then pressing the power button. After some 30 - 50 tries it finally comes to life.
Screen freezing issue (this one is a little weird) When the screen freeze, I move the display lid a little and it works. Also if its working normally and I mistakenly moved the lid, then it will freeze. Only solution I found to it is to open WhatsApp windows application or any game. Should be on the screen all the time. Then I can move the display lid however I want and the display will never freeze.

 

[tulius]

Hey,
Can I still downgrade bios? Because on their website they say that you can't downgrade your bios. I wanted to do it because my bios got updated when I upgraded to windows 11 and I faced alot of problem regarding internal graphics. As my laptop have nvidia optimus and can't disable igpu, the only way to fix my laptop is downgrading bios (as much as I know). I have tried everything to revert the laptop back to what I originally got. But the only thing left was bios and I think it's the only culprit.
Some issues were:
Black display(sometimes backlit is on and sometimes off)
I manage to boot it up by moving the laptop lid up and down and then pressing the power button. After some 30 - 50 tries it finally comes to life.
Screen freezing issue (this one is a little weird) When the screen freeze, I move the display lid a little and it works. Also if its working normally and I mistakenly moved the lid, then it will freeze. Only solution I found to it is to open WhatsApp windows application or any game. Should be on the screen all the time. Then I can move the display lid however I want and the display will never freeze.

Yes! You can with the process above.
In fact, that is what saved me from resending my X13 2023 to ASUS back because mine was unusable since 317 was installed.
Now with 313 I have a FABULOUS tiny and nice computer!

 

[SkGod]

Yes! You can with the process above.
In fact, that is what saved me from resending my X13 2023 to ASUS back because mine was unusable since 317 was installed.
Now with 313 I have a FABULOUS tiny and nice computer!

Thank you! I will update you about the progress.

 

[SkGod]

What does bios version without locks mean?

 

[SkGod]

Successfully downgraded the bios from 329 to 319.
Although the number of problems decreased.
Like the display not freezing all the time.
Don't have to open WhatsApp windows application all the time now.
But screen flickering is still there, when WhatsApp is open it gets fixed.
I hope I get the original bios from somewhere, the bios I got when I purchased this laptop.
Will try installing the year 2022 iGPU, let's see if it helps.
The problem that I want to fix immediately is black screen during boot. Looks like the iGPU driver forgets to load and windows generic display adapter too.

Can anyone tell me if the problem is anything related to hardware issue?

 

[al3qqx]

hey
thanks for your post. i am currently on bios 313 (asus tuf f15 2021) and i want to downgrade to bios 311 since i can undervolt my cpu. i have a problem tho: the bios file i put in winflash is not supported (its a .exe file). how can i solve this? i really need to figure it out because my i7 11800h goes over 95 degrees celsius on cpu based games.

 

[Alturan]

Hi, thank you for this post. However, I am getting the error "Selected file is not a proper BIOS!" Can you help me?