Cmos checksum12/12/2023 ![]() Then visit the website of the manufacturer and download the BIOS update. If the proper manufacturer’s name is not displayed in the System Information window, you will need to check the manufacturer of your computer’s motherboard manually. If you see that there is an updated version available on the manufacturer’s website, you will have to download and install the latest version to solve the error. Here, locate the BIOS version/Date section to know the BIOS version that is installed on your computer. Type msinfo32 and press Enter to launch the System Information window.Open a Run dialog using keyboard shortcut Win + R.To check the current BIOS version, refer to the following these steps: If you haven’t recently received a BIOS update, you should tally the installed BIOS version, and the one available on your motherboard manufacturer website. You will mostly receive BIOS updates automatically. Remember to be careful while making changes to your BIOS as it is very sensitive, and a small error can brick your device. Solution 3: Update BIOSīIOS refers to Basic Input Output System and is critical for normal functioning of your computer. If your faulty battery caused the CMOS error, it should now be solved. Take a note of the CMOS battery information like the voltage, size, etc., and then replace the old battery with the new one.Ī new CMOS battery should cost you around $1.5. On a desktop PC, you should have access to your motherboard by simply removing the cabinet cover. Replace your CMOS battery on your motherboard. However, due to various reasons, it can also run out of power earlier than usual. The CMOS memory is powered by a watch button-style battery, which can last from 2-3 years. The most common reason why you may be getting the checksum error is because of a faulty battery. If it does, make sure to note down the CMOS information in case you get the error again. Reboot your computer to check if it boots into Windows now. While this may look silly, a simple restart is sometimes more than enough to solve the BIOS checksum error. Now that you have a slight idea about why you may be getting this error on your device, let’s take a look at some potential solutions to the CMOS checksum error. How To Solve The ‘CMOS Checksum Error- Defaults Loaded’ Message? If your computer is abruptly powered off, it may have shut down before having the chance to write information to the BIOS memory. Microsoft Windows requires your device to shut down prior to the removal of power. Power surges can sometimes lead to your computer failing to boot into Windows.If your BIOS is somehow damaged or corrupted it will cause a value mismatch between your BIOS and CMOS, leading to your BIOS checksum error. If you made any recent changes to your BIOS, there is a chance that these settings may not have saved. ![]() The CMOS battery has an expected life span of three years, but it can discharge before that, leading to your computer failing to boot into Windows. The most likely reason why you are seeing the CMOS checksum error is a faulty CMOS battery.There are primarily three reasons why you may be seeing the checksum error on your device. In case of a mismatch between these two values, you will see a CMOS checksum error. ![]() Every time your computer loads, this value is crosschecked against the CMOS memory value. To guard the BIOS software, the CMOS memory stores a specific value on itself. ![]() What Causes The System CMOS Checksum Bad? You will see the BIOS CMOS checksum error when the computer fails to read the said information from your nonvolatile BIOS memory. When you boot back into Windows, your computer will read the previous state in which your device was from the BIOS CMOS RAM. These settings are stored on your hard drive instead, these are stored on a separate nonvolatile CMOS RAM chip.Ī Complementary metal-oxide-semiconductor (CMOS) battery maintains the BIOS memory even when your PC shuts down. In addition to booting up your computer, BIOS also maintains other settings for the hardware, like boot priorities, time and date, speeds, voltages, etc. The software on your motherboard is the BIOS (Basic Input Output System). Before Windows 10 boots up, many different processes load and your motherboard handle these low-level tasks, preparing your computer to run and then transfers these to your operating system.
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