System Shield provides military-strength defense against unauthorized attempts at recovering private or confidential information on your computer. It uses methods approved by the US Department of Defense and other military agencies to ensure that data you do not wish to be seen is unable to accessed, no matter what technique of recovery is attempted. It works by proactively finding files, folders, and other data that have been deleted and eliminating all insecure information, as well as permanently erasing all evidence that the items existed on your system in the first place.