Download the program from www.visipics.info and install it, run the program. Add the folder containing pictures on your hard-drive. To add a folder simply drags into the top pane of the program window.
Slide the Filter tab to select the level, if you want the scan to be strict, or loose. The Strict level means the slower the speed of scanning.
Then click the Play button to scan. The duplicate image should appear in the Thumb-list on the left pane. Wait until "Remaining files" and "To compare" fall to 0.
To delete duplicates, left-click the pictures to mark them (or select ‘Autoselect’ to automate the process) and click on ‘Delete’ button.