For the past 2 weeks, I have been getting the message when I restart my PC:
CMOS settings wrong.
CMOS DAte/Time Not set
New CPU installed! Please enter setup to configure your SYSTEM.
Press F1 to run setup.
Press F2 to load default values and continue.

I will run the set up and change the necessary parameters but will get same message again when I restart my PC. What is causing this and how do I correct it. My PC uses American Megatrends BIOS system. I use WINDOWS XP Pro.
Pls helpReplace the CMOS battery. Will taking out the battery and replacing not cause ANYTHING to the programs on the PCs?

Do I have to do anything before removing the battery or I should just go ahead and take the one on the mb and replace it (just like that!)

Thanks and waiting for your response.

collinsIt will not affect any data you have on the machine whatsoever...
Just make sure all power sources are unplugged when you replace it.And remember to touch the case to ground yourself before reaching in.Does every computer have a (CMOS) battery somewhere?Yes.

Except for maybe Cray RESEARCH machines...
They're kinda special.Thanks.
Problem solved with battery replacement.Excellent ! !