Victor_D Student
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HP ProBook 4540S

HP ProBook 4540S
Microsoft Windows 10 (64-bit)



I have a HP ProBook 4540s and it currently has a BIOS password which I don't remember. Is there any way I can either wipe the password to be null or somehow have it bypassed? 



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HP ProBook 4540S

Hello Victor_D,



Welcome to HP Support Forum



There is no master password or generator for EliteBooks or ProBooks. Unfortunately


All HP Business Notebooks such as Probooks  or Elitebooks have more stringent security than consumer models infact they don't produce 'halt codes', the password cannot be derived from the Serial Number and the code is stored in non-volatile memory so removing the RTC cell will not reset the password in this case.


  1. Please have a look at this link.


  1. Replace the BIOS chip


  1. Please Contact HP Business Notebook support they should be able to send you a customized SMC.bin file which you can use at boot to reset the password.

 When talking to the HP rep ask them to escalate your service request.


1.Save smc.bin you`ve got from HP support to the root of a USB thumb drive “(or save the file to the root of drive D: HP_TOOLS)” -- I used a USB drive, btw...
2. Power the laptop off
3. Hold down Windows key + up arrow + down arrow and power the laptop on
4. Let go of the keys at the HP splashscreen
5. Press F10 repeatedly at the screen that shows up with "SMC command handled successfully"
6. This should bring you into the BIOS where you need to choose “Reset BIOS security to factory default” and confirm by choosing yes
7. Exit the BIOS, saving changes
8. When the laptop reboots, you will see the coveted prompt to clear the TPM, which is shown below.
9. Press F1
10. When the laptop reboots, the BIOS password is gone




Hope this helps, for any further queries reply to the post and feel free to join us again !!


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Thank You,


I am not an HP Employee 


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