At 1st boot press F10 and RESET BIOS to factory defaults, save, restart and password will go on. After that enter in bios setup and in Main tab you have "set machine unique data" and write there what it's written on the label inside the cover. Or extract DMI from your bios dump:
Feature Byte: 476J6S6b7B7J7M7Q7W7saQapaqauawbUbhcAdpdqeTfPguk8mEmwn7nVpFpTpqqjqz.4r (no spaces)
Serial: 5CD2489L36
SKU: 6C5X2LT#ABF
Build ID: 22WWRTCT601#SABF#DABF
Board CT: PQMAN038JGV0CM
Name: HP ProBook 440 G9
Save and use BCU to exit MPM mode or restart laptop/desktop how many times counter shows.
REMOVE CMOS BATTERY BEFORE WRITING BIOS