Reboot the computer, enter the BIOS setup program, write down all the settings on each available screen.
You then need to replace the CMOS battery on the motherboard, after which the BIOS settings must be reset.
CH000239: Loosing time and or replacing the CMOS battery.:
http://www.computerhope.com/issues/ch000239.htm
Scroll down to the "Bad Battery / Replacing the CMOS battery" heading.

Signature
Glen Ventura, MS MVP W95/98 Systems
http://dts-l.org/goodpost.htm
> CMOS sheck sum error-
> default loaded.
>
> I can open in safe mode. Any suggestions?
> .
bad battery on motherboard
> CMOS sheck sum error-
> default loaded.
>
> I can open in safe mode. Any suggestions?
> .