Whether you forget your password or the used laptop you bought online shipped with a locked BIOS, hacking the password is easy enough. If physical access is unlimited, the process is similar to replacing a watch battery. If taking apart your machine is outside your comfort zone or otherwise infeasible there is a software option.
Most laptop vendors store a checksum of your password in the machine’s FlashROM – a chip that resides on your computer’s motherboard. When an incorrect password is entered three times a ‘System Disabled” message with what appears to be an error code. This counterfeit error code is actually a salted checksum of the BIOS [...]