Ridding your PC of unwanted files forever
When you want to get rid of mail that is obsolete what do you do? You either tear it up manually into thousands of pieces or run it through a paper shredder. When you need to get rid of files on your computer, you pretty much need to do the same thing. And that is to tear the data in those files into millions of little pieces. Remember, when you delete a file from your computer’s hard drive it does not remove the information contained in that file. File deletion simply marks the space used for that file as available for overwriting.
Unless and until that file is overwritten dozens of times, the information can be reconstructed. For this reason when you wish to actually permanently delete files you must run them through a file erasing program. When you are erasing the contents of entire PC you should use a drive wipe program. These drive or disk wipe programs are designed to give your hard drive a fresh start.