There might be a time where you picked up an old laptop and had a bios password lock enabled but no clue to reset it. Here we have listed 3 methods on bypassing your BIOS password.
Method 1: Reset via CMOS battery
Open the backside of your laptop or side panel of your PC.
Locate the CMOS battery > image shown below.
Remove the battery and switch on your computer. Switch it back off immediately and reinsert the battery.
Now switch your computer back on again and your BIOS password should be removed.
Method 2: Rescue Password
The system clock needs to be reset back to a time when the manufacturer rescue password was valid. Windows 10 will be used in this example.
Right click on the clock displaying the current system time on the taskbar, and select “Adjust Date/Time” on the popup menu.
Next, uncheck “Set time automatically” to enable the “Change date and time” button, click it, and set the system time to (11/23/2011).
Finally save and reboot the system. Be sure to hold the “ESC” key to reach the “Select Boot Device” prompt similar to the one below.
Select “Enter Setup” and type in an incorrect password (can be anything) into the prompt, followed by pressing the “Enter” (or Return) key one time. Now press “ALT+R” as a key combination to achieve the following prompt:
Finally, type (Please mind the capitalization as it is significant):
then press “Enter”.
Congradulations! Both User-level (required at BOOT time –before loading OS) and Admin-level (required to enter BIOS setup/configuration) passwords are reset to manufacturer’s specifications, e.g. cleared with values changed to “Not Installed” in the bios. No more password prompts at boot time or when entering UEFI/BIOS configuration menus.