You need unlock all 30 pc and keep old bios
you can buy ebook this
Guide remove password BIOS UEFI HP Support all HP: - Guide pdf and video. - Remove password encryption use software edit hex. You need to be a hardware technical to read bios backup if you don't have tool EEPROM (BIOS) programmer don't buy this...
vinafix.com
or 35$ for 30 pc send bios I unlock
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