Cmos checksum error defaults loaded what is it mean


The content of the article:

  • 1 Error Features Cmos checksum error defaults loaded
  • 2 How to fix Cmos checksum error defaults loaded
  • 3 videos

Error Features Cmos checksum error defaults loaded

If you are interested in what is Cmos checksum error defaults loaded, then translated from English this message sounds like “CMOS checksum error, parameters loaded by default “.

To make it clear what I’m talking about, I’ll explain to the reader what is CMOS As you know, today’s computers are difficult imagine without BIOS – a set of programs “sewn” into your hardware a computer. The latter allow you to configure hardware components of your PC, they are responsible for downloading the operating systems and so on.

BIOS settings that the user can change in the BIOS Setup, stored in a separate dynamic memory chip under CMOS (Complementary Metal-Oxide-Semiconductor or in Russian “Complementary Metal Oxide Semiconductor”). Volume the memory of such a chip is usually only 256 bytes, and in it in addition to the settings of your BIOS, a number of parameters of your PC.

For the CMOS chip to remember the specified data, it needs to constant food (albeit in a minimum amount). Last thing implemented by a miniature battery (usually CR2032), which supplies CMOS board for several years (on average 5-6 years). Herself the battery is usually next to the motherboard’s CMOS chip circuit board.

Battery in the chip

Microchip battery

When you turn on the computer, the current amount is compared data in CMOS with a benchmark, and if these amounts are not match, then the user gets a Cmos checksum error defaults loaded.

Also, in rare cases, the cause of the described dysfunction can be influenced by viral programs. What is it means Cos checksum error defaults loaded we figured out Now let’s think about how to fix it.

How to fix Cmos checksum error defaults loaded error

If you are interested in troubleshooting Cmos checksum error defaults loaded, then for easy loading of the operating system your computer will just press the F1 or F2 key (or Delete).

If the problem recurs regularly after each reboot of your PC, then a physical replacement of the CR2032 element is necessary, located on the motherboard of your computer. Turn off computer, open the system unit by removing the roof, find and remove CR2032 by pressing on the tongue latch (try to reduce touch to other parts of the motherboard to a minimum). Get in nearest computer store (or market) similar new element, and install it instead of the extracted one (plus batteries should usually be located on top).


Battery Replacement

After replacement, turn on the computer, set the current date in BIOS and time, as well as other parameters necessary for comfortable work of your pc.

It will not be superfluous to also check your computer for availability various malware (Dr.Web CureIt !, Trojan Remover, Malwarebytes Anti-Malware and several other antivirus programs).


When considering the issue, the values ​​of Cmos checksum error defaults loaded, it is worth, first of all, to conclude that the appearance of the message “Cmos checksum error” often means discharging the supply chip CMOS element CR2032. To solve the described problem will be just replace the specified item (its price amounts to a negligible amount), and continue to enjoy further stable operation of your PC.

James Walls

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