Shredder lets you permanently delete items on your PC you no longer need. You can use Shredder as you would use a paper shredder, to safely dispose of your private files.
When you manually delete files and folders, empty your Recycle Bin, or delete your Temporary Internet Files folder, you can still recover this information. Shredder protects your privacy by safely and permanently deleting unwanted files, so they cannot be recovered. If you sell or donate your PC, no one will be able to use or see the items you shred.