Oftentimes, the more that computers are used, the slower they seem to become and the smaller the available hard drive space becomes. This is because the computer stores a great deal of information in the form of temporary files, outdated or redundant system files and Recycle Bin items. These items are typically not deleted automatically. Windows contains a utility that can help you locate and remove these unnecessary files. The amount of space that you can recover depends on how long the computer has been used and the type of tasks that you perform with it.
Select a disk drive to delete files from by clicking the drop-down box that appears. If you have only one hard drive, click "OK."