For this we will have to start our computer and when we are on the black screen of the Checksum error, press the F2 key to enter the BIOS. If the problem persists, you may need to reset the CMOS values to the factory default values and reset the configuration data. Restore default BIOS settings to fix CMOS Checksum error. Once everything has been verified, be sure to save and exit CMOS setup. In such a case, you will have to replace the CMOS battery and check if the problem is resolved. If this is not the case, the button cell battery on the motherboard is exhausted. This date and time must match the current date and time. This will allow you to access the BIOS configuration screen where you can verify the date and time that the screen shows. To check if this is the element causing the error, you must press the Del, Delete or Delete key from the CMOS Checksum error screen. If you still have the CMOS Checksum bad error or CMOS Checksum error that prevents the startup of your Windows computer, here are several methods on how to fix it: Check and / or Change the CMOS battery to fix the CMOS Checksum error.Īs we have mentioned, one of the reasons for this error may be the button battery that is connected to the motherboard of your computer. For example, it could be because a CMOS battery is dead. This could happen if the CMOS cannot retain data due to a malfunction. The CMOS Checksum Bad error on Windows computers normally shows up when the CMOS contents fail to verify the hardware and BIOS information. In addition it is also responsible for starting and checking the hardware such as: the CPU, memory, keyboard, mouse, etc. Therefore it is the first program that is run when the user turns on their computer. ĬMOS (Complementary Metal-oxide Semiconductor) is a battery-powered semiconductor chip on the motherboard that stores all information related to the BIOS. With the F2 key we may be luckier since it will restore all the default values which will get Windows 10 started if the error is due to a recent change. If this problem has worried you, read this article to find a solution. Pressing F1 also does not solve the problem and the reboot error reappears. That is, if we press the F1 key what we will do is restart our computer so that generally the problem will not be solved and we will end up in the same error.Įvery attempt you make to restart your system fails. In general, next to the CMOS Checksum bad error in the BIOS of Windows computers, several actions are usually shown, such as Resume if we press the F1 key or load default values and continue if we press the F2 key. Specifically, this error is more related to the BIOS of your computer (basic input / output system). The CMOS Checksum bad error is displayed when your computer is unable to start, that is, it is unable to start the Windows 10 operating system, which truly indicates that the error is not due to the operating system itself. You may also be interested: How to solve a problem with font size in Windows 10 In many cases these errors can be due to the hardware instead of the Windows Fall Creators operating system, such as: CMOS Checksum Error or CMOS Checksum Bad. However there are different bugs or problems that have not been corrected with this latest update. The latest October update for Windows 10 incorporates a host of useful new features, but it also fixes some bugs and issues with earlier versions of the Microsoft operating system. Windows 10 constantly improves with each update that is released and installed on our computer.
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