* Duplicate Cleaner always recommend backing up your files before running any cleanup activity.
* As a general rule you should only delete a file if you know what it is, and you are sure you don’t need it. If you think you might need it then keep it.
* It is always a bad idea to delete files from your Windows and Program Files folders unless you know what you are doing.
* The selection assistant can help with selecting files when you have a large list. You can also set input folders as ‘Protected’ to be sure you are removing files from the correct folder/drive.