If your computer forces you to go to the BIOS every time you turn it on, especially when it’s had the power turned off for a while, that’s because the BIOS battery is not charging.
The BIOS battery is a disk shaped battery that’s about the size of a watch face and is connected to the motherboard inside the computer. The BIOS battery is used to save various BIOS settings while the computer is disconnected from an electricity source (mains power), settings which change over time… such as the computer clock.
Changing the BIOS battery will stop the computer from forcing you to boot into the BIOS each time you start the computer.