Your friend should have said Flash your BIOS.
Please check the link below,select your OS,download & save the latest BIOS of your mainboard..http://support.asus......del=M2N-MX SE
kindly refer to your mainboard’s manual on how to make a bootable disk,as well as setting your boot sequence/options,where you will load the BIOS & boot from there.
You might want to READ the guide (mainboard’s manual) carefully & follow the procedures step by step.rember,by doing this, it’s not an ordinary program or software that you normally un-install then re-install afterwards.improper flashing may lead to a serious problem/damage to your motherboard & may not be useable again.
If you’re not confident that you can do it by yourself,ask someone that has full knowledge of flashing a BIOS & let that person do it for you.