This error is almost always caused by a problematic CMOS battery. This error usually means that your CMOS battery is dead and has no charge left. Since this CMOS battery is used to keep your system clock running when your system is turned off, you will get this error on every startup of your computer. The CMOS battery is a small battery that you will easily recognize on the motherboard. The battery can die because of old age, if your computer is really old, or because of a power surge.

Check and Replace CMOS Battery

Since we know that the problem is mostly caused by the CMOS battery, your first solution should be to check the battery or replace it with a new one. But, before you buy a new battery to replace the old one, it’s worth fixing your time from the BIOS. Sometimes, the problem gets solved if you fix the time from the BIOS and select the settings that says “Restore BIOS to Default”. These are the steps to fix your time from the BIOS Now, restart your computer and check whether the error is still there or not. If the problem is still there then it’s time to replace your CMOS battery. If you aren’t confident enough to do this on your own, you can simply take your computer to a technician and he/she will be able to replace the CMOS battery. Note: If you don’t know where the CMOs battery is, refer to the manual of your model. You can find a manual of your specific model from your manufacturer’s website.

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