Hp Probook 450 G2 Bios Password Reset 'link' May 2026

How to Reset the BIOS Password on an HP ProBook 450 G2

The HP ProBook 450 G2 is a robust workhorse of a laptop, often used in corporate environments. Because of this, they frequently arrive on the second-hand market with a BIOS password still enabled. If you are locked out of your system configuration or cannot boot from a USB drive because of an unknown password, this guide will walk you through the reset process.

Important Disclaimer: The BIOS password is a security feature designed to prevent unauthorized access to system settings. Only perform these steps on hardware you own or have explicit authorization to modify. Some methods involve opening the laptop case, which may void any remaining warranty.

Method 1 – SMC.bin script (software-based, requires boot)

If you can boot to OS but can’t enter BIOS: hp probook 450 g2 bios password reset

  1. Download SMC.bin (HP BIOS unlock tool – available on forums like Badcaps)
  2. Boot into DOS (FreeDOS USB)
  3. Run: 
    SMC.bin /x
    This resets the security chip’s password storage.

Limitation: Works only if BIOS isn’t locked completely (i.e., system boots but prompts password before BIOS setup).

Is this legal to do?

Yes, if you own the laptop. It is illegal to bypass BIOS passwords on stolen equipment or company-owned devices without authorization. Technicians: Always verify ownership. How to Reset the BIOS Password on an

Method 2: Removing the CMOS Battery (Hardware Reset)

Unlike older laptops, modern ProBooks often store the BIOS password in non-volatile memory, meaning removing the battery may not always work. However, it is worth trying as a first hardware step.

Tools needed: Small Phillips-head screwdriver, plastic prying tool. Method 1 – SMC

  1. Power down the laptop completely and unplug the AC adapter.
  2. Flip the laptop over. You generally do not need to open the full chassis; you only need to remove the service door (the small panel covering the RAM and Hard Drive).
  3. Locate the CMOS battery. On the ProBook 450 G2, it is usually a small, round, silver coin cell battery (CR2032) connected by two wires to the motherboard.
  4. Disconnect the battery by gently unplugging the connector from the motherboard. Do not pull the wires; pull the white plastic connector head.
  5. Hold down the Power button for 30 seconds while the battery is disconnected (this drains residual power/flea power).
  6. Reconnect the CMOS battery and close the service door.
  7. Turn the laptop on and press F10 repeatedly to enter BIOS.
  8. If successful, the password prompt will be gone, or you will receive a "CMOS Checksum Error" and be asked to reset the time/date.

Method 1: The "Manufacturing Mode" Trick (SMEG)

This is a known "backdoor" method specific to some HP ProBook models (including the G2 series) used by technicians to clear passwords set during manufacturing.

  1. Power off the laptop completely.
  2. Press the Power button to turn it on.
  3. Immediately start tapping the F10 key repeatedly to enter the BIOS.
  4. When the password prompt appears, try entering one of the following default passwords:
    • PROBOOK
    • hp
    • hewlettpackard
    • SMEG
  5. If these do not work, leave the password field blank and press Enter.

Success? If you get in, immediately go to the Security tab, select Change Password, enter the current password (or leave blank), and set a new password you will remember (or leave it blank to remove it entirely).

Failure? If these defaults do not work, the previous owner set a custom password. Proceed to Method 2.