Fix Your Pc CMOS Cave

Bad or possibly old battery
Restart the program. If the error persists after restarting the computer, go to the CMOS version and check all values. Also parse the date and time correctly. After everything has been checked and replaced, be sure to save the settings and then exit the CMOS setup.

Almost all common symptoms of a CMOS battery failure are incorrect or slow BIOS access and system time, difficulty with BIOS settings when shutting down the laptop, error messages with the clock stopped, etc. If the CMOS battery is low, the BIOS settings will be lost when you try to shut down the computer .


If the underlying problem persists after you turn on the computer, the Cave Wide CMOS array may not be working or is clearly damaged. Try leaving the computer on for a few days before removing the CMOS battery. Sometimes the battery will charge if you leave the program running.

In Windows, CMOS stands for Metal Oxide Complementary Semiconductor Manufacturing. It is the most sensitive battery-backed memory found on the motherboard of your modern computer. The term also refers to a specific type of storage technology that helps the BIOS (Basic Input/Output System) program on a new PC store important system clues such as date and time schemes, boot process, hard drive information, and almost all other software. . settings.

CMOS corruption is a fairly common occurrence. Unfortunately, in most cases, this indicates a malfunction of the motherboard, but, unfortunately, this is not the rule. The problem may be in the BIOS / UEFI or it is out of batteryCMOS battery.

If this memory is deficient, your computer will see a fatal CMOS Checksum Bad error even before you can Start Windows. In this guide, we have shown you what is causing the error and how to fix it.

What Causes A CMOS Checksum Error On Windows?

Restart your computer. A normal machine usually generates a new checksum to fix the error.
Download the BIOS update and use your thumb. Download the message from the motherboard manufacturer’s website.
Reset your current BIOS.
Replace CMOS battery.
Contact a technician or computer to take action to resolve the expert’s error.

“Checksum” describes the form (number or letter) that others use to control or validate files in the storage model. You will get an invalid CMOS error checksum on your PC because the CMOS memory values ​​are harmful. This may be due to the installation of an incorrect or corrupted BIOS extension. The CMOS itself is powered by an appropriate battery, designed so that a person can get a CMOS checksum error if the CMOS battery is low, empty, or old.

The CMOS checksum is usually incorrect, perhaps because the system was reset during BIOS boot or simply because the RTC battery ran out. corrective action. Restart the system. If the problem persists, replace the real time clock battery.

Power surges or even improperly unplugging your computer from the mains can also easily lead to a CMOS checksum error. Despite many reasons, a CMOS checksum error can be fixed immediately.

Fun fact: CMOS is also known as Real Time Clock (RTC), COS-MOS (Complementary Metal Oxide Semiconductor Symmetry), and Non-Volatile Random Access Memory (NVRAM).

How To Fix It CMOS Checksum Error

If your primary Windows PC is experiencing a new invalid CMOS checksum error at startup, the troubleshooting solutions below should fix it.

Run An Auto-restore Event

You can also use Startup Repair to fix problems that prevent Windows from starting correctly. Turn on your computer and follow the instructions below. your

  1. If your computer turns on frequently, go to Settings > Update & Security > Advanced Startup > Restart Now.

If Windows absolutely won’t start completely, turn your desktop computer off and then on again. When the screen is on, press and hold any F8, F11, or almost any key until the advanced boot menu appears on the screen.

Another way to download an extended boot list is to boot a computer created by three consecutive systems. That is, turn the computer over and immediately press and hold the power button on the right to turn off the computer computer That’s three times and your computer should load the extended boot menu on the third try.

  • Select “Troubleshoot”.
  • Select More options.
  • Choose Startup Repair.
  • Also, enter your password for the respective account and click Next. Leave the field blank, click the dialog box and continue even if someone’s account is not password protected.
  • This safe tool constantly diagnoses your computer and also tries to fix system errors that usually prevent it from starting properly. After the process is complete, restart your computer and check if the CMOS checksum is updated frequently.

    Reset BIOS To Factory Settings

    Performing a BIOS reset may delete all policies stored in CMOS. From our side, the operation should also remove corrupted data and incorrect BIOS values. How you enter the BIOS and perform a factory reset depends on your motherboard, not to mention your PC manufacturer.

    Additional information with . See our BIOS reset guide for Windows. Be sure to restart your computer and reset the BIOS properly. This restructuring removes all checksum values ​​and fixes the CMOS error.

    Press F1 or F2 on a specific error page when you need to enter the BIOS setup program, then select Load Defaults, Reset, Load Defaults, or another common plan to restore BIOS settings to default.

    Some require you to press a number of different keys (usually Del or F8) to access the Windows BIOS Setup Checker. Check the instructions on each individual error page to make sure.

    After exiting the error page, you can completely reset the BIOS settings that appear in the advanced Windows boot menu. Turn off your computer and wait 20-30 seconds until it turns off completely on paper.

    1. Press the power button and generally keep the F8 and F11 prompts when starting up the PC just before the Windows logo fills the entire screen.
    2. Select “Troubleshoot”.
  • Select More options.
  • Select UEFI firmware settings.
  • Click Restart and start the workstation using the BIOS Arrange utility.
  • The BIOS setup interface varies depending on the make of your PC. However, you should find the Customize BIOS setting in the output section of the most recent BIOS setup sheets.

  • Go to let them log out, use down arrow to complete selection to complete default settings and force login.
  • If you can’t find the setting, reset your BIOS settings to default, contact your PC manufacturer, or refer to your device’s tutorial.

  • Select Yes and press Enter.
  • Restart the specific computer. A normal reboot usually triggers a new checksum and fixes the specific error.
    Download and flash the BIOS update. Download the update from the respective motherboard manufacturer’s website.Reset BIOS.
    Replace CMOS battery.
    Contact a technician or computer repair technician.


  • Move

    1 Turn on your computer and wait a few minutes for the update to complete. The computer may either shut down. 2 Close your computer case and restart your precious computer to see if a CMOS checksum error occurs on the computer! Next

    Move the cursor directly to Exit Save Changes and press Enter.

  • The ability to reset your PC’s BIOS settings to default values ​​and start Windows. To verify that this is a collectible seal, turn your computer and device back on. Try each of the following troubleshooting steps if you get”Invalid CMOS checksum” error message when trying to start the computer.

    Update BIOS

    Update the BIOS as if your PC’s BIOS version is not necessarily the latest version available outside of the manufacturer’s online store (you can simply check the BIOS driver download section). Download the BIOS update campaign that suits your PC model, enjoy the freedom of administration and let the tool update your device’s BIOS automatically.

    Before proceeding, make sure your current BIOS is the perfect sensitive component associated with your PC motherboard. Installing an invalid update or an incorrect BIOS update can also permanently damage your motherboard. Necessary if you carefully follow the publications of the PC manufacturer so as not to damage the device.

    However, we strongly recommend that you do not download the BIOS registration data only from your PC manufacturer’s website. Also make sure the BIOS needs to be updated, for example on your PC. Another computer’s BIOS file being installed on your computer is blocking its motherboard.

    Lastly, don’t shut down or restart your computer while you’re adding it to the BIOS. Any interruptions (such as a power outage or power surge) during operation can damage the BIOS or motherboard.

    Replace This CMOS Battery

    As mentioned earlier, if the battery powering the CMOS is considered low, your system may simply not be able to check the status of the new BIOS file. Signs of bad CMOS design are wrong numbers and timings, less competent peripherals, communication problems with the entire planet, etc.

    If we also get a CMOS checksum error from time to time after car repairs, the CMOS is probably a bad battery. Or maybe he was fed from the spot.

    CMOS data corruption is a fairly common occurrence. Unfortunately, most of the time this indicates a faulty motherboard, but it’s definitely a rule of thumb. The problem may be in the BIOS/UEFI or a specific CMOS battery may be defective.

    Invalid CMOS checksum, likely due to the system resetting the BIOS during boot or the RTC battery being depleted. medical technology. Restart the system. If the problem persists, replace the real time clock battery.

    Fix Your Pc CMOS Cave
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