HP BIOS unlock tool

[MchRichelieu24]

Could you unlock my BIOS?

HP Zbook g5

SN 5CD9131MFN

[peste]

Could you unlock my BIOS?

HP Zbook g5

SN 5CD9131MFN

post the original contents of the bios chip..

The bios chip must be unsoldered from the board before writing or reading..
do not use the clip, you may have errors..if you do not have anything to unsolder it with,
solder wires between the programmer and the bios chip..

you need an SPI programmer...here is a video for example..https://www.youtube.com/watch?v=DWWi...nnel=ThisIsHow

[Andreasbest]

I have a strange behavior with unlocked 8440p.
Admin password removed succesfully, i can enter bios with F10 BUT i can't change any setting, whatever i do when i save, exit and enter again BIOS it's not stored, like it's locked on specific settings.
I tried factory defaults, secutiry reset, bios update through Windows but no success.
Seems like the admin password really gone but the permission to make changes in BIOS remained.
Attached is the unlocked file that i flashed.
What do i miss?
SN: CZC13O234X

Thanks in advance!

[hoaca388]

I have a strange behavior with unlocked 8440p.
Admin password removed succesfully, i can enter bios with F10 BUT i can't change any setting, whatever i do when i save, exit and enter again BIOS it's not stored, like it's locked on specific settings.
I tried factory defaults, secutiry reset, bios update through Windows but no success.
Seems like the admin password really gone but the permission to make changes in BIOS remained.
Attached is the unlocked file that i flashed.
What do i miss?
SN: CZC13O234X

Thanks in advance!

Try clear ME .
https://www.badcaps.net/forum/troubl...22#post1622422

[Andreasbest]

Try clear ME .
https://www.badcaps.net/forum/troubl...22#post1622422

But it's the original BIOS from this particular machine, i didn't use from another laptop, still need ME cleaning?

[Andreasbest]

I have a strange behavior with unlocked 8440p.
Admin password removed succesfully, i can enter bios with F10 BUT i can't change any setting, whatever i do when i save, exit and enter again BIOS it's not stored, like it's locked on specific settings.
I tried factory defaults, secutiry reset, bios update through Windows but no success.
Seems like the admin password really gone but the permission to make changes in BIOS remained.
Attached is the unlocked file that i flashed.
What do i miss?
SN: CZC13O234X

Thanks in advance!

Can't make MEanalyzer to run, colorama, crccheck etc seems impossible for me to install. Can someone clean ME to try it please?
Thank you!

[akorede]

https://www.indiafix.in/2025/06/hp-g...wnload-hp.html


might be usefull

[Zadiq]

Will it work with 840 g5

[peste]

Will it work with 840 g5

read post #1..

[soniqu]

hi, problem with BIOS Probook HP 450 G6, black screen, need help, SN: 5CD9369GNG

[Sidqi Januar Riadi]

First check this site to see if your HP is supported for the great tool Mazzif has made.

http://mazzifsoftware.blogspot.com/p...os-unlock.html

If your model is newer and not in that list, you need to dump your bios, remove password from dump and reprogram bios with modified dump.

For that you need an SPI programmer like CH341A or Raspberry Pi with Flashrom or any other similar programmer. A soic8 clip is also useful so there wouldn't be a need to unsolder bios IC.

When you have your dump, just drag and drop your file on my HPUnlocker tool and it will create a new file. It will add "_unlocked" to the name of your locked file.

Just program the new file on your bios IC.

This unlocker should work on all Elite, EliteBook, ProBook and maybe some other series HP laptops.

For those of you who need to unlock large amounts of laptops, I recommend adding a registry entry:

Computer\HKEY_CLASSES_ROOT\*\shell\HPUnlocker\command

Then modify that string adding

"C:\*location-of-exe*\HPUnlocker.exe" "%1"

This way you just need to right click your locked file and select HPUnlocker.

If there are any issues, please do let me know so I can improve this tool.

All Elitebooks, Probooks and zbooks which are up to ninth generation which should be up to year 2018, like 840 G5, are supported. Newer models are not supported (yet atleast).

No Pavilions or other trash is supported

-----------------------------------------------------------------
NEW multitool and unlocker added .

Unlocking
HP - ProBook, EliteBook, ZBook (including 32MB models)
Chromebooks from all various manufacturers
Apple - everything older than T2
More to come...

RCUnlocker https://www.badcaps.net/forum/showthread.php?t=98539
.

thanks so much brorther ,god bless you