CMOS/GPNV Checksum Bad, Press Del to Run Setup

[ecurbnitram]

Hi all, I keep getting this error.  When I get into setup and reset the default, the time is right, I save and exit.  But still can't boot from HD.  Any help would be appreciated.

[patio]

Have you recently added any RAM to this machine....
If so what type ? ?
You may want to replace the CMOS battery located on the MBoard part # CR2032 available at any computer store and /or Wally World...