Regarding brute force -- 3 strikes followed by a mandatory reset would make the process take near-forever.

“The most common way that most of us know for resetting or clearing the BIOS password is to physically remove the power from the computer by disconnecting all cables and removing the battery from the motherboard for a few minutes. Nowadays, HP Elitebook is popular because of its high quality as well as great performance. When setting up the SpareKey, you are prompted to provide answers for a sequence of three predetermined personal identification questions. Worked perfectly! There are times where removing the CMOS battery doesn’t work, … I just used this about 2 weeks ago to crack the password stored on a Compaq N610c laptop. 1D3B 2A7B 595B 595B with bug A95B For laptops, there is a master password that dell will give to a verified owner to clear a forgotten password. Reset HP Elitebook BIOS/Administrator Password . Note: HP SpareKey is a utility that helps you, or the administrator of the computer, recover lost system passwords, such as the power-on, drive lock, or BIOS passwords. The methods we will share to crack BIOS password will work on laptop and desktop.It is excellent to know how to reset the BIOS password because it does get annoying when you forget it. How to Bypass BIOS Passwords: BIOS passwords can add an extra layer of security for desktop and laptop computers. It's the first choice for many buyers, especially office workers who pay a lot of attention on the datas protection. Discussing how to crack laptop bios passwords will get you banned here. Switch on laptop, you will see password-entry screen, on this screen is displayed your servicetag: -1D3B, -2A7B, -A95B, -595B Enter this servicetag below (without # or *), and press Calculate. They are used to either prevent a user from changing the BIOS settings or to prevent the PC from booting without a password.