What does it mean and why?
The options were F1 to continue (What I did)
and F2 for set up utility.

What is this all about?
Thanks

There is a small battery on the motherboard that keeps the CMOS alive.

This is "non-volital" memory that remembers all the setup info. The battery is what makes it non-volital.

Just as all batteries do, these motherboard batteries eventually die.

Changing it can range from super easy to being a pain and involve soldering.

Ok I remember seeing one when I had it open a while back. Thanks Mike.