Needing to be replaced. This is a Coin Battery CR2032 and a commonly used battery by many devices. It provides power to the Real Time Clock in the CMOS or as some prefer BIOS and not only provides correct Date & Time but it also saves the settings. So things like CPU Fan Settings and CPU Temp as well as CPU Type and amount of Installed RAM and HDD are covered by this. They should cost between a few cents to a couple of dollars depending on where you buy one.
When the battery goes flat these settings get lost and you have to press the F1 Key to continue which effectively accepts the current BIOS Settings which would be the Defaults and proceeds to load the system.
If the CPU Fan Control is messed up it will cause this to happen but before rushing out and buying a new battery you should look at the CPU Heat Sink. These get clogged with Dust and other Air Borne Gunk and in sever cases can prevent the fan from spinning. When this happens all that is required is to open the case and with some Canned Air blow out the Heat Sink while preventing the CPU Fan From spinning.
The CPU Fan is nothing but a Electro Magnetic and a Permeant Magnetic which will generate Power if it's allowed to spin and that power will cause damage to the M'Board and other fitted components.
So the two things to look at are the CPU Heat Sink for a buildup of Crud and the BIOS Battery for going flat.
If you have to replace the BIOS Battery remember to unplug the system before removing the battery as it's a metal case if it's dropped onto the M'Board while there is power there it will cause a Short Circuit. I've had many systems brought in that should just need a replacement Battery but after their owners have attempted to change the battery they now need a new M'Board because of damage that has been caused by Dropped Batteries.
Col