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You have noticed that the clock on the bottom right in your Windows isn’t correct and seeking for the solution badly thinking that there must be the problem in your windows setting. So, you in tend to adjust it right but few hours later the clock goes wrong again. Besides, most users don’t think much on CMOS battery as this shows sign of losing its BIOS setting on boot up as well. Replacing the CMOS battery is very simple or follow the instructions below:

Instructions:

1. Boot your PC and enter its setup mode.
2. Write down all of the settings from the various BIOS menus.
3. Power off your PC and plug out the power cable as well.
4. Open the case of your computer
   
5. Locate the battery on the motherboard.
   
   The layouts of the components differ on different motherboards, so you’ll have to consult your motherboard user manual for specifications about the battery and its location.
   
   A close-up view of the typical CMOS battery on the motherboard.
6. Remove and replace the old battery.
   
7. Replace the case and power on the PC.
8. Enter the setup mode of your PC.
9. Reenter the settings you have written down from the various setup menus.

Tips:

• Don’t forget to observe proper anti-static precautions when working inside the case of your PC.
• If you can’t see your battery right away, try removing expansion cards or unplugging cables. The majority of newer motherboards use lithium batteries that look like large watch batteries.
• If the battery is already dead and you receive messages saying “CMOS checksum error”, skip Step 1 and Step 2.

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