BIOS downgrade

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crashman
Posts: 1
Joined: Mon Jan 15, 2018 12:27
Product(s): LIFEBOOK AH544/G32

BIOS downgrade

Postby crashman » Tue Jan 16, 2018 17:06

Hot to downgrade BIOS V1.2.2 (secure bios) to V1.2.0?
High CPU utilization (one core 90-100pc, second 3-4 pc) after BIOS update.
How to do it from Windows 10?
I've tried flash BIOS from DOS. It's impossible. '' BIOS image is equal or older than ROM!''
''If Secure BIOS is enabled there is no possibility to flash the BIOS in DOS environment.
Please use the Windows based flash procedures instead of.''
Are there any ideas how to do it? The reason is not OS or drivers. It happens on Linux too.
LIFEBOOK AH544/G32
Intel® Core™ i5-4200M
8GB DDR3L 1600MHz
NVIDIA GeForce GT720M
I would be grateful for any help.

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sabrex
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Joined: Thu Jun 05, 2003 0:01
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Location: England
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Re: BIOS downgrade

Postby sabrex » Tue Mar 13, 2018 0:34

Possibly secure boot is enabled in bios check in bios under security - secure boot configuration - then secure boot

make sure it is disabled - if it is enabled and greyed out try set a admin password 12345
then go back and set disabled and then removed the pass 12345

On save and exit you should be able to load dos and run Flash from dos

nicoursi
Posts: 4
Joined: Mon Feb 10, 2020 12:37
Product(s): lifebook a544

Re: BIOS downgrade

Postby nicoursi » Tue Feb 11, 2020 22:17

As I had the same problem, and as this answser didn't help at all, I will post the solution for whoever needs it.

Fujitsu should fix this problem anyway. I still cannot understand why they have released 5 more versions after 1.2.0, with each of them bringing the problem back from the "solved" state.

Downgrading is disabled by default from the tool provided by fujitsu. You need to disable the BIOS build date time checking in order it to work.

Here the complete instructions (go to point 3a if you know already how to make a FREEDOS bootable drive with the bios update software inside):

2. Preparation

2a) BIOS Update - DOS

After downloading the *.zip file containing the BIOS Update - Admin Pack you need to extract all files of the DOS folder (\DOS) to an e.g. FreeDOS bootable media (e.g. USB Memory Stick). You can create a FreeDOS bootable USB Memory Stick using the following link:

http://support.ts.fujitsu.com/Download/ ... AB265A9690



WARNING:

!!! ALL DATA STORED ON THE USB MEMORY STICK WILL BE ERASED PERMANENTLY !!!

!!! PLEASE ENSURE THAT A DATA BACKUP HAS BEEN DONE BEFORE !!!





3. BIOS Update Procedure

Important notes:

- If Secure BIOS is enabled there is no possibility to flash the BIOS in DOS environment.

Please use the Windows based flash procedures instead of.

- Please connect a working AC adapter before starting BIOS flash.

- Please suspend BitLocker encryption before starting BIOS flash in case BitLocker encryption is enabled.

- Please do not switch off your system until BIOS flash process is completed.

- Please reboot your system after BIOS flash has been completed.


3a)
Edit \DOS\DOSflash.bat by adding the /sd option to the following command:
dosflash /bbl /cvar /silent /file BIOS.Cap
The command should be like this:
dosflash /bbl /cvar /silent /sd /file BIOS.Cap
save DOSflash.bat

3b) BIOS Update - DOS

Run \DOS\DOSflash.bat to update your System BIOS in DOS environment.


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