my name is sridhar .i have compaq loptop with windows7 home premium operating system.how to format with out cd/dvd drive.bez my automatically restart .then how to solve this problem.
Do you want to format it or re-install Windows? You can download some utilities that will boot of a USB drive to format a disk. http://www.ultimatebootcd.com/customize.html, you can make a bootable USB drive using this.