Question how to update a bios of hp z 420

[abbaqa]

i ve not found an easy and fully explained way to update my bios...here are the details of my pc..
https://i.ibb.co/YfnR8dB/z-420.png
plz guide me step by step tutorial to update its bios..thx a lot.

 

[helpstar]

follow the installation instructions:
https://support.hp.com/us-en/driver...z420-workstation/5225033/swItemId/vc-242977-1

little how to on youtube:

View: https://www.youtube.com/watch?v=7AXuvRv0-60

 

[abbaqa]

follow the installation instructions:
https://support.hp.com/us-en/driver...z420-workstation/5225033/swItemId/vc-242977-1

little how to on youtube:

View: https://www.youtube.com/watch?v=7AXuvRv0-60

it gives an error in the end

 

[helpstar]

How does the error look like?