HP Probook 6450b locked bios

[rcraw]

This laptop has bios locked. It will not boot from dvd/cd or usb drive. I've chatted with HP Support, I tried the instructions he gave. They are below. I created the D:HP_TOOLS folder and rename and copied the bin file. I tried the Windows key + up arrow + down arrow many times. The laptop just booted straight into Windows 7. I never got a message saying "SMC command handled successfully".

This laptop has 6gb ram running a 64gb SSD drive, running Windows 7 Pro 64bit.

Steps:

1.Save attached smc.bin file in this e-mail to the root of a USB flash drive “(or save the file to the root of drive 😧 HP_TOOLS*)”

1. Power the notebook OFF.

3.** Hold down   windows key + up arrow + down arrow and power the notebook ON.

1. Let go of the keys at the HP splash-screen.
2. Press F10 repeatedly at the screen that shows up with a message, "SMC command handled successfully"
3. This should bring you into the BIOS where you need to choose “Reset BIOS security to factory default” and confirm by choosing Yes.
4. Exit the BIOS, saving changes.

[CF4]

Hi

Is it one of these  HP ProBook 6450b Notebook PC?

With the notebook off, press and hold the Windows logo key and the B key at the same time.

https://support.hp.com/gb-en/product/hp-probook-6450b-notebook-pc/4173642/troubleshooting

https://support.hp.com/gb-en/drivers/selfservice/hp-probook-6450b-notebook-pc/4173642

Recovering the BIOS

https://support.hp.com/gb-en/product/hp-probook-6450b-notebook-pc/4173642/document/c02693833

Updating the BIOS

https://support.hp.com/gb-en/product/hp-probook-6450b-notebook-pc/4173642/document/c00042629

Is Bitlocker involved, and needs t be disabled/overridden temporarily?

[rcraw]

The Windows key + B key did not  work. It locked up my laptop. I had to unplug power + remove the battery. Also I do not have Bitlocker installed.