BIOS password is a protection measure that can be used to stop unauthorized users from powering up a computer system or making changes in some of the computer's most sensitive areas. However, at times, we need to enter the BIOS to make some changes, only found a BIOS password is there. How to reset or remove a BIOS password?
The easiest method to remove a BIOS password is to remove the CMOS battery. The computer remembers its settings and keeps the time even when it is powered off, because these parts are powered by a small battery inside the computer called CMOS battery. If you take out this battery, the computer will lose its hardware settings, including the BIOS password. Please note that it will also remove the changes you have made to the default settings.
First of all, power off the computer, unplug the power cable and unplug any USB devices if they are powered. The computer must not be able to get power from anywhere. Then remove the computer case and locate the CMOS battery. It should look something like the picture below. Some computers have this part standing upright.
Take out the CMOS battery and wait 10 minutes before putting it back in. Be sure that you ground your hand before touching anything inside your computer, otherwise you might short the component. The reason for this wait is because the computer can still store power in its capacitors even though everything is unplugged. The waiting period allows enough time for them to discharge.
Plug everything back in, power on the computer and enter the BIOS again. If everything goes well there should be no more password. In some cases, if you get weird error messages during bootup now, you will need to go to "Load BIOS Defaults" in BIOS and save the changes to fix them.
Laptop users will be difficult to access the CMOS battery. If you use a laptop, you could use a backdoor password instead. These passwords are encrypted, but can be decrypted by running special key generating programs. On many computers (especially old ones), computer manufacturers create backdoor passwords for their own technicians to use so they could access the BIOS when the hardware is being serviced.
Power on the laptop. When prompted for the password, type a incorrect password three times. This will lead to the System Disabled screen. Don't worry, the system is not actually disabled, it will boot up again when you reboot the computer. Take note of the displayed number. You will need this to generate the backdoor password.
On a working computer, visit bios-pw.com and enter the code. The website will generate a bios backdoor password for you.
Here are some of the backdoor passwords that have been reported. You may need to try quite a few passwords before you find one that works.
|(eight spaces)||AWARD PW||djonet||SER|
|manufacturer - password|
|VOBIS and IBM - merlin||Enox - xo11nE||Jetway - spooml||SOYO - SY_MB|
|Dell - Dell||Epox - central||Packard Bell - bell9||TMC - BIGO|
|Biostar - Biostar||Freetech - Posterie||QDI - QDI||Toshiba - Toshiba|
|Compaq - Compaq||IWill - iwill||Siemens - SKY_FOX|