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To set the Date & Time, go into the BIOS setting - date 7 time. When you set the Date & Time and you get this error again when you next boot up your computer, then most likely you have a flat BIOS battery. Then replace this battery, it could be a coin size battery - 3 volt lithium battery type CR2032. and then go into the BIOS setting and set the Date & Time.
The BIOS battery keeps the Date & Time and the BIOS settings from changing. If the BIOS battery is flat then these settings are changed to the factory settings. Yuo need to insert a new BIOS battery then go into the BIOS setting to set the Date & Time etc.
When you change the date and Time to the correct Date and Time and when you next boot up the laptop the Date and Time is lost. Then this is caused by a flat BIOS battery which cannot keep these setting stored in the BIOS. Replace the BIOS battery then go into the BIOS setting to set the Date and Time and this will fix your problem.
Go into the BIOS settings then to the Date and Time and set the Date and Time, Save the settings and Exit. IWhen you boot up later and the Date and Time is incorrect then the BIOS battery is flat and a new replacement battery is needed. The BIOS battery keeps the laptop's configuration plus the Date and Time settings unless the battery is flat.
If you fixed the Date and Time in the BIOS and when you boot up the
laptop next time the Date and Time is wrong, then most like the BIOS
battery is flat and needs replacing.
After the BIOS battery has been replaced go to the Bios and set the Date and Time.
When the Date and Time is set in the BIOS setup or in Windows and when you boot up next time and the date and time are incorrect then the problem is a flat BIOS battery. A flat BIOS battery cannot keep the Data and Time stored in the BIOS. Replace the BIOS battery and set the Date and Time etc and the problem will be fixed.
When you boot up and the Date & Time is wrong then you correct the
Date & Time, then when you shut down and boot up again the Date and
Time has changed. This is an indication that the BIOS battery is flat
and you need to replace the BIOS battery. Install a new BIOS battery, go
into the BIOS setting and set the Date & Time etc. and the new
battery will keep your settings stored in the BIOS.
To set the Date and Time on your computer - go into the BIOS configuration then to Date and Time to set the correct Date andTime. If the Date and Time needs setting up again after to boot up the computer again, then the BIOS battery needs replacing because the old battery is flat and cannot maintain (store) the Date and Time.