Actually "zero filling" is the method of totally wiping a drive clean where nothing can be recovered later. Active KillDisk and other similar tools write binary zeros to a drive until the disk is completed. With 2000, XP, and Windows Server versions of Windows the drive tools needed are included in the installer itself to delete as well as create new partitions in order to install Windows on any hard drive. The installer will also format the new partition as part of the installation process.