@Crowmans ~ I'd not be too happy either if my new board had a dying battery! We scratch our heads and wonder how long the darn battery was sitting on the board!!
I've just come upon another set of options for HP and Compaq desktops running W7 (any chance your computer is an HP? I think the first step is worth trying before opening up the case:
Step 1) If Internet time is set and you are connected to the Internet, the computer connects to an Internet time server and synchronizes the time to the time on the server. Internet time can provide an accurate method of keeping time and is normally recommended. However, in some cases, Internet time might actually cause problems. Use the following steps to disable or enable the Internet time setting depending on what is currently selected.
Step 2) In this case, I would not mess with the BIOS (yet?)
Step 3) Remove and reinstall Realtime clock by starting the system in Safe mode. Use the following steps to perform this task: again read: http://support.hp.com/us-en/document/c01853713
Step 4) Desktop computers contain a battery to keep time in the same manner as a watch keeps time. Like a watch, the battery should be replaced when it runs low on power. Replace the battery using the following steps.
again read: http://support.hp.com/us-en/document/c01853713
By now..you must be extremely exhausted as you've been repeating your time! It's snooze time your way!