– On 450 G2, it’s near the memory slots or under a sticker. Look for 25Q64 or 25Q128 .
Turn on the laptop and intentionally type an incorrect password three times.
Enter a wrong password three times until a "System Disabled" message appears. Note the (it may start with an 'A').
When a grey window initializes on your display, release the keys and follow the on-screen prompts to clear security defaults. Method 3: The "System Disabled" Code Generation Route hp probook 450 g2 bios password reset
Answer your three security questions accurately to grant entry and clear the existing password. Method 2: Official HP Support and SMC.bin File
Once HP Support validates your ownership, they will email you a file named SMC.bin . Format a standard USB flash drive to .
| Method | Difficulty | Risk Level | Tools Required | Success Rate | | :--- | :--- | :--- | :--- | :--- | | HP SpareKey | Easy | None | None | Low | | Master Password (Error Code) | Medium | None | Internet connection | Medium (if supported) | | Hardware Pin Shorting | High | Medium | Small flathead screwdriver, tweezers, wire | High | | BIOS Dumping & Flashing | Very High | High | CH341A programmer, soldering skills, PC | High | – On 450 G2, it’s near the memory
Technicians often use specialized software, such as RC Unlocker, to remove the password from a backup of the BIOS file before flashing it back to the chip.
This is the for a home user on a locked HP ProBook 450 G2. It requires technical skill, patience, and about $15 in tools.
: If a "System Disabled" message appears followed by an 8-digit code (sometimes starting with "A"), write it down. Enter a wrong password three times until a
Because the HP ProBook 450 G2 relies on a dedicated EEPROM chip (often a Winbond or MXIC brand chip) to hold security data, removing the CMOS battery will fail. If software options are exhausted, the password can only be cleared by physically flashing or shorting the security chip.
Attach the test clip to the BIOS chip, ensuring Pin 1 (marked with a dot on the chip) matches Pin 1 on the programmer.