Many program files are stored in system disk drive by default.
As a 100% free disk wiper, Macrorit Data Wiper is also 100% Free with Malware, Spyware and Adware
This easy-to-use hard drive eraser is compatible with all Windows operating systems. With powerful algorithms and comprehensive wipe ability, Macrorit Data Wiper provides the easy-to-follow solution for permanently destroy data and offers no possibility to recover. Studies have shown that most of today's media can be effectively cleared and purged by one overwrite using current available sanitization technologies Here are more.
However, for ATA disk drives manufactured after 2001 (over 15 GB) the terms clearing and purging have converged. * For some media, clearing media would not suffice for purging. Including US Department of Defense Directive 5220.22-M (DoD 5220.22-M). The storage-overwriting process complies with United States government requirements for deleting sensitive user data, MACRORIT DATA WIPER uses a storage-overwriting process to overwrite the sectors on the device.