Format C:

Need to format your hard drive? Cops knocking at your door? Keep this handy: Darik's Boot and Nuke. Allows you to boot via CD-ROM or even a USB device and delete your hard drive. From the website: "DBAN prevents or thoroughly hinders all known techniques of hard disk forensic analysis." Sounds impressive. I haven't had a reason to use it just yet. Will come in handy when I go to sell that old laptop.