Recommend Paragon Disk Wiper Personal 7.0

Paragon Disk Wiper 7.0 completely erases a whole hard disk, separate partition or just free space, providing maximum level of security. It guarantees secure and easy erasure of your critical data with the powerful algorithm and customization option, wizard-based interface and extensive reporting. You can irreversibly destroy all on-disk data easily and quickly, so as it cannot be recovered with any present-day technology.