Hello, this issue has popped up on the French forum too. The best response was the following:
'The battery on your motherboard may be worn. Try to change it, it costs nothing.
Be careful when removing the old battery to avoid damaging the media. And when you put the new battery in, hold it by the sides, it is not recommended that you touch the top or bottom of a battery.
Starting a PC without a battery or with a dead battery is not a problem, all it contains is the configuration of the BIOS. On the other hand, knowing that removing the battery is the equivalent to putting BIOS to its default settings'.
This article will help change the motherboard battery.
Depending on your the age of your motherboard, the battery could be one of the circlular 2032 batteries.
Let me know if this resolves your issue.
Content Editor and Community Manager - CCM.net