DupliTrack

DupliTrack finds and removes duplicate files based on the rules you establish. This program comes equipped with a few advanced settings which are intuitive enough to be figured out by any type of users.
Before proceeding any further, you should know that this it hasn't been updated for a very long time, so you might encountered stability issues on newer Windows editions.

Set up rules to find and remove duplicates

DupliTrack is wrapped in a user-friendly interface that lets you begin by indicating one or more folders to scan for duplicates, recursively or not.
You can allow a difference in file duplicates of 1%, as well as set up rules to instruct the utility how to proceed in the event of locating a duplicate in two locations. It's possible to delete either the items in the first or second folder, or to ignore such events.
In the main application window you can study details about cached files and folders, currently scanned file and remaining items, along with the cached bytes and disk size. The cache can be cleaned on scan completion

Performance results and observations

Surprisingly, the tool didn't put a strain on the overall performance of the computer in our testing, as it needed a low amount of CPU and RAM to work properly. It worked smoothly, without triggering the OS to hang, crash or prompt error messages. The speed of the scan jobs depends on the size of the target files but it's decent.
On the other hand, DupliTrack doesn't leave much room for customization. For example, you cannot narrow down search results by applying filters with the file type, date and size range, or other attributes.

Conclusion

To sum it up, DupliTrack offers a simple and straightforward method for finding and removing duplicate files. Since it doesn't feature richer configuration settings, it's mostly geared toward casual users.