Duplicate file finder

Do any Norton Utilities or other Products/Services have a duplicate file finder?

 

I used a freeware utility, Doublekiller, & found a bunch of large files that appear to be duplicates.  Some are my user generated files and some are program files.

 

As a N360 user, I would PREFER to have a reliable service like Norton to advise on finding and removing files that may be hogging memory or slowing performance.  Is it being done in N360 and not mentioned under my terminology?

[A forum query and a read of the Norton Live services did not mention removing dupe files as a part of boosting performance or clearing memory.]

 

[Dell desktop, Win XPpro, SP3, N360, all updates current]

Thanks for the comments or redirect.