This procedure overwrites the free space on any fixed hard drive(s) which may contain data that you do not want to be retrievable. This operation can take quite some time depending on the size of the free space and the number of user selected passes to overwrite the free space. An option to perform a " Secure delete " on a folder instead of the entire free space is available under the section " Drive Information " and then use " TreeSize information " and right click on any folder to perform the secure delete. Ignore any warnings from Windows indicating that " insufficient free space " has occurred during the " Wipe Free Space " procedure.