Setting of the Search Options

Where to search Duplicate Files?

Find the necessary folders/drives and add them to the list by clicking "Add" button.
Update: You can also add directories by dragging them from the Windows Explorer.

Setting of the Search Options

Set the following options:

• Set file mask
  Click "Define Masks" to select what kind of files to search
• Set Min file size
  to exclude files with less size than been specified
• Set Max file size

System Protection

Exclude system folders (e.g. "Windows", "Program Files" etc.) from the search if you want to protect them.

Check "Protect other system files" option to exclude system files (that are situated not in system folders) from the search.