BIOS (Basic Input/Output System) is the most essential software in all computers, from PCs to laptops. BIOS performs a power-on-self-test (POST) to initialize the hardware and devices connected to your computer and also helps run your OS. Additionally, without BIOS, the OS cannot use the hardware.
That is why BIOS must be up and running. In this article, we have discussed the purpose of BIOS in your computer and will also keep clearing your concepts about other aspects of BIOS. Let’s start our topic with the main answer and then explore the different issues regarding it.
Why Does My BIOS Keep Getting Corrupted?
The BIOS keeps getting corrupted when it has a failed flash. Flashing a BIOS fails when the installation or update is interrupted. A corrupted BIOS does not let the operating system start because it neither performs POST nor invokes the bootloader. Most of the well-manufactured mobos have backup BIOS.
The second reason your BIOS keeps getting corrupted is the dried-out CMOS battery on your motherboard. You must have noticed that there is a button cell on your motherboard. This battery keeps the BIOS working even when your computer is switched off.
If this battery stops working, your BIOS becomes corrupted, and your computer does not start properly. The visible sign is your computer system’s wrong time and date every time you start it. In the worst case, the language of your mobo changes, and it becomes hard for you to find your preferred language.
But don’t worry; we will share the method to change the CMOS battery so you can use your PC again. First, shut down your PC and unplug all its cords to prevent electric shocks. You should press the power button for 12 seconds as well. It will discharge any residual charge in your PC.
Then, place your computer system flat on an even surface and open its side case, unlocking it. Find the CMOS battery on your motherboard and read its name so you can buy the same one. These batteries have technical terms like CR2032. The second thing is to remember the battery’s polarity before removing it.
Usually, the positive side is on the front of these batteries, while the negative side faces the motherboard in your PC. A small metal lock keeps the CMOS battery in its place. Use a small screwdriver or forceps to open this lock only by pressing it backward. Just place the new battery and push it.
When your BIOS gets corrupted, the backup BIOS starts. It initializes all of your hardware or the devices connected to your PC, performing a power-on-self-test (POST). That also controls the bootloader so your operating system (OS), such as Windows 10/11, can execute. It is always good to have such a motherboard.
If you can see the signs or messages about the corrupt BIOS, then there is hope that you can fix it by yourself. It will not only save you money but also a lot of energy. For this, you will need a bootable media that contains your OS. Just insert a bootable USB flash drive into your computer and choose the boot option.
As Windows shows the first user interface (UI) about installation, you need to select the repair option instead of the option for installing Windows. On the following form, it will ask you what you want to repair. You will see a UEFI/BIOS option that you need to select. It is how your corrupted BIOS will get repaired.
There is another solution to repair the BIOS that keeps getting corrupted repeatedly. The reason behind this can be some kind of fault in the settings of your BIOS. You can fix this by resetting the settings. Hopefully, after this, your BIOS will start working correctly. Suppose it does not, then try other options.
Resetting the CMOS jumpers can also keep your BIOS from corrupting. There is a button cell or CMOS battery on your motherboard. Near this battery is a jumper on two out of three adjacent pins. Remove the jumper from its default pins (1-2) to pins (2-3) for 5 minutes and return it to its default position.
In the worst case, your monitor screen will blackout if your BIOS is corrupted and your motherboard does not have a BIOS backup. It is because it was the responsibility of the BIOS, but without it, none of your hardware can initialize and perform input-output functions. You will have to repair the BIOS now.
How Does BIOS Get Corrupted?
BIOS is firmware, meaning software in an IC chip that enables a computer to use. It is also responsible for communicating with your operating system (OS), you, and other devices installed in your computer. Hence, the first sign of a corrupted BIOS is that your operating system does not start.
It usually shows you messages regarding the corruption of your BIOS, and you get stuck on a particular user interface or screen, but the operating system won’t start. There are several reasons behind a corrupted BIOS. The first and foremost reason is the faulty BIOS firmware. It is nothing but an IC chip on your mobo.
- BIOS Chip
If the BIOS firmware or chip is in an IC socket, you can fix this issue by replacing it. But if it is soldered on the motherboard, you have no option but to replace your mobo. A power surge or voltage fluctuation may have corrupted your BIOS. We recommend you use surge protectors.
- Outdated BIOS
Another reason for a corrupted BIOS is your motherboard’s outdated or expired CMOS battery. You can replace it with a new one to protect your BIOS from getting corrupted repeatedly. But you must be very careful as this battery has a polarity and a specific order to install.
You may have downloaded or executed a virus from some website that has corrupted your BIOS. As mentioned before, repair it using the bootable flash drive or DVD. If your BIOS was being updated and something went wrong, such as your PC going off, it would get corrupted.
- Power Failure
A power failure during the BIOS update is dangerous for your firmware and can cost you your motherboard. The latest motherboards have backup BIOS. Your motherboard senses that the main BIOS is corrupted, so it starts the backup BIOS so you can use your computer system without any problems.
How to Repair Corrupted BIOS Firmware?
There may be some fault in the BIOS IC chip on your motherboard, which gets corrupted repeatedly after a certain period or randomly. Using your operating system (OS), such as Windows 10/11, is impossible in both cases. As a result, your production becomes low.
The first thing that you need to do is check if your PC is still under warranty. In this case, you should not perform any of these procedures. We recommend you contact or go to your computer manufacturer or vendor and tell them about the issue. They will provide you with services for free, even replacing your mobo.
If you have a bootable USB flash drive or DVD containing your operating system, you can fix your corrupt BIOS if you have the internet. Just insert the flash or CD and select the boot option. Wait until the window appears. Instead of choosing the option saying “Install now,” select the “Repair” option.
After doing this, you will see an interface with multiple components to repair. You must select “UEFI/BIOS” to fix your corrupt BIOS. After this, choose suitable options and let Microsoft Corporation repair your BIOS issues preventing your Windows from starting.
You can boot from the backup BIOS if you have a Gigabyte motherboard. For this, power your computer off first. After this, press the power button and keep holding it. First, your computer will start, and then it will shut down. It will boot from the backup BIOS when you power it on.
Replacing the BIOS firmware is also an option if none of the methods work for you. If your BIOS chip is fastened in an IC socket, you can quickly and carefully remove it using a tweezer. Then, you can purchase the same BIOS firmware for your motherboard and install it in the same socket.
Do you remember the order in which the previous BIOS firmware was installed? We recommend you take a picture before doing this to prevent any loss. If the BIOS firmware on your motherboard is soldered, you will need to replace your motherboard. It is also a chance for you to upgrade your computer system.
In a nutshell, BIOS is the base of your computer system. It helps you boot up your Windows 10/11 and other operating systems. If it gets corrupted, your system cannot start up properly. It can be corrupted due to malware or a power failure during the update. This article helped you understand how to repair corrupted BIOS firmware.
Hey, I’m Hammad. I write for this website to help you with the IT advice about PC, RAM, CPU, Motherboard, PSU, and other PC components.
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