CCleaner is a free software to clean up your computer from the unused files and to optimize your computer's  system . It can be used to clean up the unused file from your computer and speed up your computer . You can really save a lot of space from your hard disk . It deletes the unused temporary files from your computer and it can also clean up your recent online activities . That means , it will clean up the cookies , history , recently typed URLs , last download location and temporary internet files from your computer's internet browser . Not only will clean up your windows default internet browser but it can also delete the data from other internet browsers including Google Chrome , Mozilla Firefox , Safari and Opera .