when I log on I get an Alert! which says "System battery voltage is low. F1 to continue or F2 to run setup utility." I am a retired guy and I have no idea what that means. Can anyone help?

I found some info on a thread which makes me realize I should supply more detail. I have a Dimension 8400 purchased in December 2004. I read suggestions that the problem may be that I need a new battery on the Mother Board. I read that it is a round battery similar to a watch battery, possibly a CR 2032. I am not very comfortable messing around with the insides of the computer but I should be able to handle pulling out a battery and replacing it.

Does this seem to make sense?