HP BIOS unlock tool

[RethoricalCheese]

Re: HP BIOS unlock tool

It's somewhat dangerous "knowledge" because I don't know too much about it aswell and it easily bricks the laptop when not used correctly. Just happened to figure out the somewhat correct area to look at. Needs some testing and fine tuning.

[Maxpower3]

Re: HP BIOS unlock tool

It's somewhat dangerous "knowledge" because I don't know too much about it aswell and it easily bricks the laptop when not used correctly. Just happened to figure out the somewhat correct area to look at. Needs some testing and fine tuning.

a relationship with Interrupt Vector Table ?

[Burag]

Re: HP BIOS unlock tool

Hi @RethoricalCheese, could you please provide the Python script? I do not use Windows therefore my eyes bleed when I see "exe" file
I could probably decompile the exe by myself, but thought that asking is always a simpler solution

[Burag]

Re: HP BIOS unlock tool

Cannot edit my previous post - in case anyone looking for python script, here it is:

# decompyle3 version 3.7.5
# Python bytecode 3.7 (3394)
# Decompiled from: Python 3.7.11 (default, Jul 22 2021, 15:59:35) 
# [GCC 8.3.0]
# Embedded file name: HPUnlocker.py
import mmap, shutil, sys
path = sys.argv[1]
splitpath = path.split('.')
newpath = splitpath[0] + '_unlocked.' + splitpath[1]
shutil.copyfile(path, newpath)
loc_old = 0
word = b'U\x00s\x00e\x00r\x00C\x00r\x00e\x00d'
oldword = b'$VSS'
oldword_key = b'B\x00i\x00o\x00s\x00U\x00s\x00e\x00r'
oldword_end = b'\xaaU'
with open(newpath, 'r+') as f:
  with mmap.mmap(f.fileno(), 0) as m:
    m.seek(0)
    loc = m.find(oldword)
    if loc == -1:
      print('new bios mod')
      m.seek(0)
      loc = m.find(word)
      for j in range(0, 100):
        if j > 9 and j < 14:
          m[loc + 16 + j:loc + 17 + j] = b'\xff'
        else:
          m[loc + 16 + j:loc + 17 + j] = b'\x00'

    else:
      print('old bios mod')
      while True:
        loc_start = m.find(oldword_key, loc_old + 2)
        loc_len = m.find(oldword_end, loc_start) - loc_start - 22
        print(loc_start)
        if loc_start == -1:
          break
        else:
          for i in range(0, loc_len):
            m[loc_start + 22 + i:loc_start + 23 + i] = b'\xff'

          loc_old = loc_start

    m.flush()
    m.seek(0)
    f.seek(0)
# okay decompiling HPUnlocker.pyc

[skinner]

Re: HP BIOS unlock tool

You're welcome, thanks for your feedback.

Just another update. That message seems to only have appeared on one of machines, but not the other. It only appeared on the 1st bin in the rar file but not the other. I'm not sure why as I use the same message to flash them but regardless, it works for me so thank you again.

[charly14]

Re: HP BIOS unlock tool

@RethoricalCheese hi... master ...they will likely never see this error ... black screen, key blink (caps lock)...
old lady hp4530s ... i need help (I can't attach a file) new user limited english

[lengygf]

Re: HP BIOS unlock tool

Hi all,

I am trying to remove the BIOS password for my Elitebook 850 G4. Tried the unlocker tool here and (did a bin file comparison) the only thing changed was the AdminPW section.

Also tried to replace the BIOS section in the original dump, but then the PC won't start. The fan is blowing hard but nothing displayed on the screen,

Could anyone help me remove the password in the attached BIOS dump? 850 G4 is pretty new and I can't find any success feedback here. Thanks a lot everyone!

[peste]

Re: HP BIOS unlock tool

Hi all,

I am trying to remove the BIOS password for my Elitebook 850 G4. Tried the unlocker tool here and (did a bin file comparison) the only thing changed was the AdminPW section.

Also tried to replace the BIOS section in the original dump, but then the PC won't start. The fan is blowing hard but nothing displayed on the screen,

Could anyone help me remove the password in the attached BIOS dump? 850 G4 is pretty new and I can't find any success feedback here. Thanks a lot everyone!

try ..

[magictouch]

Re: HP BIOS unlock tool

Hi,
I Unlocked the bios on my hp 650 G1 Using hp unlocker tool,
the problem i am having is that as the laptop starts to load windows the wait circle keeps on spinning with the windows logo but never loads the window.
i have changed the hard disk, tried installing the new windows, new ram, different processor but no joy. also when I install the old bios backup, the behaviour does not changed, I also updated the bios an factory reset it but no joy.
i believe the problem Is with the bios.
i have attached both original and unlocked files.
anybody can help/guide?

[Raj.verma.soni]

Re: HP BIOS unlock tool

6050A2922701-MB-A01 bios please

[Vesko356]

Re: HP BIOS unlock tool

6050A2922701-MB-A01 bios please

You're off-topic here, create your own thread and upload your bios backup in it.

[Reigor3]

Re: HP BIOS unlock tool

Buona serata ragazzi, posseggo un hp 840 G7.
Il bios non ha alcuna password, ma è stato modificato da HP su richiesta.
Il bios presente non permette l'installazione di windows 10, ne consente la partenza di una chiavetta usb bootabile.
Allego il file, puo essere utile per studio.

[Vesko356]

Re: HP BIOS unlock tool

Buona serata ragazzi, posseggo un hp 840 G7.
Il bios non ha alcuna password, ma è stato modificato da HP su richiesta.
Il bios presente non permette l'installazione di windows 10, ne consente la partenza di una chiavetta usb bootabile.
Allego il file, puo essere utile per studio.

Good evening guys, I own an hp 840 G7.
The bios has no password, but has been changed by HP upon request.
The bios present does not allow the installation of windows 10, it allows the start of a bootable USB key.
I attach the file, it can be useful for study.

Write in English please.
Upload your 16MB bios backup here.
What do you mean by "does not allow installation of windows 10" & "has been changed by HP "?

[rmfaisal59]

Re: HP BIOS unlock tool

@vesko356 help me for unlock 840 g6 bios

[Vesko356]

Re: HP BIOS unlock tool

@vesko356 help me for unlock 840 g6 bios

Sure, I've just sent you the file & instructions.

[Millanarun]

Re: HP BIOS unlock tool

Hi please unlock my hp bios 745 G2 file I'm attaching

[Millanarun]

Re: HP BIOS unlock tool

Please help 745 G2 bios unlock I'm attaching the bin file now please unlock it

[Millanarun]

Re: HP BIOS unlock tool

Sure, I've just sent you the file & instructions.

Sir help me unlock bios password sir please

[Millanarun]

Re: HP BIOS unlock tool

@vesko356 I'm new to this forum and please help me sir my hp 745 G2 bios file it will be great help for me sir

[Vesko356]

Re: HP BIOS unlock tool

@vesko356 I'm new to this forum and please help me sir my hp 745 G2 bios file it will be great help for me sir

There's no need to write several messages in a row about the same thing.
Be patient!
You have an AMD platform, and afaik this model should have two chips - 8 and 2 MB, what programmer and software do you use? What is the inscription on the chips?