When you don't want sensitive data to fall in unsafe hands or keep it away from prying eyes, using a disk wiping tool would be the best solution. The aptly named Disk Wiper is a very good option because it comes with advanced data wiping options in an easy to use interface.

It is wizard-based and guides you through the process of securely deleting files from the hard drive. It comes with high data erasing standards as well as the possibility to create a customized algorithm. It also includes a wiping media builder to create bootable media to boot in DOS mode and destroy all on disk information even when the current operating system cannot boot anymore.

It also provides an advanced disk management tool for creating partitions and formatting disks.