ROM BIOS or commonly known as BIOS is an integral part of a computer. Whenever we turn on the computer, initially it shows the memory capacity, also suddenly the light of the NUM lock glows, and there is a beep sound at end, after which we see the familiar Windows Logo. For a computer geek this is a normal behavior which a computer exhibits after it is turned on, however the same cannot be said about others who are not much familiar with computer hardware, and might be using it to accomplish the daily tasks. They might keep on wondering, what exactly happens when the computer is actually turned on. Here comes the role and importance of the BIOS. It is a chip located on the systemboard or motherboard of a computer. It holds all the information pertaining to the hardware of the computer. Suppose you have added a new hard drive to your computer to enhance the space, and that hard drive is not getting detected in BIOS.
Will you be able to use that drive once you login to Windows? The answer is No, BIOS has to detect the hard drive first, since it holds all the information related to hardware settings, and then it will be detected by the operating System.BIOS hold all the information related to hardware settings, system date and time. It is also responsible to initiate POST which is a self-check done on the system by itself.
There are some annoying scenarios where you want to change some settings in BIOS and you find that it is not taking the password. You might get a screen like this.
This also might be a scenario where you have bought the computer for someone else and the seller didn’t share the BIOS password. Also possible that someone else uses the same computer and has set a different password in BIOS. We keep on trying with our best guessed passwords. But, after certain tries also it didn’t work, then do what? If I cannot enter BIOS that means I won’ be able to make any changes in settings.
In that case we have to break the BIOS password .There are different ways to crack BIOS password. Some steps are given below :
Step 1 The first option will be to change the Password Jumper Settings on the BIOS. There is a specific jumper on the motherboard which is meant for this. However it is advisable to read the product manual first before trying this step, because the position of the Jumper will differ from one motherboard to another.
Step 2 To perform this one has to turn off the computer, make sure the power cable is out of the wall outlet.Unsrew the screws located on Side Panel of the CPU.
Step 3 Once, you do that, identify the location of the BIOS jumper on the motherboard by checking in product documentation and reset the same.
The jumper might be labelled as CLEARCMOS or JCMOS1.However the best will be to always refer to the product documentation.
Step 4 Once this is done, restart the computer and check whether the password is cleared or not. Now once the password is cleared, turn off the computer once again, and put back the jumper to its original position.
If the first method doesn’t works, you might try the backdoor entry. In case of desktop this has to be accomplished by checking the CMOS jumper.
For laptop users the process will be entirely different, since they have to use backdoor password entry option. Enter wrong password thrice on the screen, which will show an error like this.
Make a note of the code which is displayed. And then find a BIOS password cracker tool like this site: http://bios-pw.org/ Enter the displayed code and then the password will be generated in few minutes.
Another situation similar to the scenarios we discussed above can be solved by bypassing the BIOS password. The methods which can be used here are similar to the methods used in previous scenarios. In addition to that, we can use these two methods as well:
Method: Overloading the keyboard buffer
This method is specific to some of the old system boards, and it is quite possible that newer systems might not be able to implement this. This is done by booting the system without mouse or keyboard, or in certain BIOS architectures, it might work by hitting the ESC key in quick succession.
If you have tried to crack BIOS password and it is not working for you, you can reset BIOS password perhaps.
Step 1: Locate the CMOS battery .
CMOS battery will be of flattened round shape. CMOS is an integral part of System board BIOS, and all the motherboards will have a CMOS battery. It is very easy to identify on the motherboard, since it will be round, flattened and coin shaped. It stores the BIOS settings which include basic hardware settings, date, time, and other system information. To remove the CMOS battery, firstly the system has to be turned off, and also make sure that power cable is disconnected.
Step 2: Remove and put back battery
Once the system is completely turned off remove the CMOS Battery. Wait for 15-20 minutes. Put back the CMOS battery and turn on the system.
Step 3: Reset password
After the step 2 is done you can bypass the BIOS password and can login to your computer successfully. Note that you can add a new password again from BIOS. If you forget the password again then continue step 1 and 2 to reset the password.
This method is working only if you can access the installed Operating System. Once we login to our desktop we have to run the MS-Dos program, and execute the following commands in same order as it is shown here:
debug, o 70 2E, o 71 FF, quit
This command resets the BIOS settings which includes the BIOS password as well. This process is accomplished by using Debug tool from MS-Dos.
Today there are lots of third part software available, which can reset BIOS password but access to the Operating System is necessary. Some of the popular BIOS password cracking software are used like CmosPwd and Kioskea
Backdoor BIOS password is a set of passwords, which are master passwords provided by BIOS Vendor. These passwords are generic, and they are specific to manufacturers. In other words all the manufacturers maintain a set of master passwords which can be used irrespective of whatever password user has set. These passwords are not very hard to get by and can be easily accessed from manufacturer’s website.