This program has three functions. Firstly, this program
can clean the FREE SPACE on your hard drive to ensure that
deleted files cannot be undeleted. Cleaning the free space
of a drive does not affect existing files. Secondly, this
program can be used to fully erase existing files, so that
they cannot be undeleted. And thirdly, this program can
create more space on your hard drive by erasing unneeded,
temporary files.