Usually, when you try to clear CMOS you open the case and search for the battery, you could either remove the battery or change a jumper to clear the CMOS or bios.
However, there is a way to do this without opening the computer case:
PRESS "del" KEY WHEN YOU POWER ON THE COMPUTER if(typeof __ez_fad_position != 'undefined'){__ez_fad_position('div-gpt-ad-tutorials_technology-medrectangle-3-0')}; This trick should work on most computers and it should clear CMOS.