Hirens BootCD ver. 15.2 used
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1) Assure your PC boots from required 1st device as CD drive within BIOS setting. Also disable secure boot and UEFI setting or whatever wording is used. For USB users, either flash or ext. CD drive know identifier name.

2) Insert bootable Hirens BootCD you created and reboot
3) Select DOS pgms. from menu
4) Select password tools
5) Select required password pgm.
6) Follow prompts

Once corrected password is edited or deleted, you can re-activate the
secure and UEFI boot setting in the BIOS and save upon exit.

tada -----Willy Happy