However, for individuals, HP includes a backdoor "reset block" in the BIOS, but it is disabled by default unless configured via HP BIOS Configuration Utility. Try this first:
While removing the CMOS (RTC) battery is a common fix for older or consumer laptops, it typically does work for the ProBook 450 G2 How To Reset BIOS On Your HP Laptop Safely
is a complex task because business-class laptops utilize enhanced security features that differ from standard consumer models.
If you succeed, immediately enter the BIOS (F10 on startup) and set a new password that you will remember. Better yet, leave it blank and rely on Windows Hello for security.