I have to give my computer to someone and I want to delete all of my files before then. Everything I have read requires a boot disk and my A drive does not work. I am using Windows XP. I know I can select boot from CD/ROM in the BIOS, but I do not want to reinstall an OS or any other software. Is there a way I can wipe my hard drive clean without having to reinstall anything, as I do not have a Windows CD to reinstall?