How to Reset/Remove Forgotten BIOS Password

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BIOS stands for basic input and output system on a computer. A PC stores bios password in non-volatile memory, which keeps your data even your PC is powered off. And this non-volatile chip is located on your motherboard called BIOS memory. One of the common usages for bios is to change boot order in order to reinstall OS from external drive such as DVD or USB drive. For security reasons, a few computer manufactures set a default bios password for the computer it produces. Also, you can add a password to computer bios by your own. When a password was set, you will be promoted to enter the right password in next time you access it. If you forgot the password, then you can't do any thing to change the bios settings, which would be a disaster in certain cases.

Though it is a scare thing when you forgot the bios password, you still have chances to recover it with the steps shared in this tutorial. The tutorial is quite simple and you can practice it right away. You will be able to unlock your bios without much effort. These tips will help you to eliminate it but make sure do not be confused BIOS password with the login password to access the desktop, which displayed after the Windows logo. If it was just the login password, you can check this guide to reset windows login password.

Technically, you can reset your BIOS by removing the laptop battery and hold the power button for more than 10 seconds on some laptops. However, here I will share you two different ways to reset the bios password for PC and Laptop as well. The methods will work on those computers and laptops: Dell, Lenovo, HP, ASUS, Acer, Toshiba, Samsung and others.

Part 1: How to Reset BIOS Password with Windows Debugging

  • Step 1: Power on your computer and open command prompt.
  • Step 2: Input debug and '-O 70 10 '.
  • Step 3: Input ' -O 71 ff '.
  • Step 4: Input ' -q '.
  • Step 5: Reboot your computer and the password will be removed.

Note: The first 'O' is a character and the following are digits.


debug windows bios password


Part 2: How to Reset BIOS Password by Removing CMOS Battery

  • Step 1: Shutdown the computer and disconnect it from charger.
  • Step 2: Use a screwdriver to unpack the computer.
  • Step 3: Locate the battery on your motherboard. Carefully remove the battery and usually it comes a hook at one end.
  • Step 4: Press the hook to remove the battery and wait for about 20 seconds.
  • Step 5: Place the battery back in place and turn on your PC.

By doing this, the bios password will be reset to blank. And you can access bios settings without inputting password any more.


remove cmos battery


Part 3: How to Reset BIOS Password by Changing Jumper Position

If solution 2 doesn't work for you then, consult the documentation of your motherboard in order to change the position of the jumper, which allows you to restore BIOS. However, if you have no documentation, try to find one of the following: BIOS CLR, CLR CMOS, CMOS CLEAR, CLEAR BIOS, CMOS RESET or RESET BIOS. It is generally close to the backup battery on the motherboard and the jumper name associated with the word.



  • Step 1: If the reset jumper is based on the 2-pin connector and is riding on a single pin, place it on the two. Wait a few seconds, and then put them back in its original position.


  • Step 2: If the reset jumper is based on the 3-pin connector, put it from the pin1-pin2 to pin2-pin3 position. Wait a few seconds, and then put back the to its original pin 1-pin 2 position.



bios jumper


After finishing the above steps, reconnect all the parts. Then power on the computer. The BIOS password should disappear this time and BIOS settings will be reset to default. Next time you set a password for it, make sure write it down somewhere so you can find the password when you forgot tit. Though the above tutorials are simple to follow, it still takes much time to unbox the parts.

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