[Napoleon Porlumpar]

...that means you need to replace the cmos battery.

But after that you may not be able to boot up windows after replacing the battery and restore default bios.

These are the last few steps that need to do to solve it.
https://www.groovypost.com/howto/fix-win...r-bootrec/

why mini pc ?.................normal size pc also same problem ?

i had a pc whereby the battery gone case for several years.................no problem leh...............only must adjust time only...........