Try this 1
Try resetting your BIOS settings.
Turn off your PC and remove the power chord --> Open the cabinet --> Remove
the CMOS battery for 15-30 minutes and then put it back properly. Now plug the
power cord back in and switch ON your PC.
Click on the below hyperlink "CMOS Battery" if you don't have any idea about the
If the problem still exist, click on the below link and follow the instructions in