http://www.ultimatebootcd.com/ http://www.ultimatebootcd.com/ has a selection of tools for disk wiping. If it is a Windows machine and you are trying to leave

http://www.ultimatebootcd.com/ http://www.ultimatebootcd.com/ has a selection of tools for disk wiping. If it is a Windows machine and you are trying to leave Windows in-place (not recommend) you can at least delete your user account, empty the trash can, and then run a program like SDelete - http://technet.microsoft.com/en-us/sysinternals/bb897443.aspx http://technet.microsoft.com/en-us/sysinternals/bb897443.asp...