On newer EliteBooks (e.g., 840 G7, 1040 G8), HP Sure Start (a self-healing BIOS) can roll back corrupted settings:
Traditional methods like removing the CMOS battery will not work on these business machines because the security credentials are stored in non-volatile chips. Hp.probook.elitebook.bios.password.reset.utility.hpbr
Some HP models allow a password hint. Use a memorable but obscure clue. On newer EliteBooks (e
Not all HP laptops work with the same algorithm. Based on community testing, the unofficial HPBR methodology works best on: On newer EliteBooks (e.g.