Ok, and I don't mean to slam Rachel here...just some constructive criticism from a longtime Tom's tech-nut:
"Thousands of duplicate files from your picture and music collection can be spotted and eliminated – freeing up memory for more important things."
Deleting files does not free up memory, it frees up hard drive space...two completely different things. This is a very common mistake, and it may sound like I'm being a pedant, but if you're going to help educate the mainstream and curious consumer, please arm them with the correct terminology because it's the little things like this that make them a target when they enter a big box store and talk to a rep (assuming the rep knows the difference, of course).
Secondly, the suggestion of allowing system files to be viewed is a pretty bad oversight by the publisher, if you are indeed catering these suggestions to mainstream and curious users. This kind of suggestion will only get an average computer user into trouble when they start hacking away at .dll or .sys files and it has no bearing on being able to find duplicate files that the publisher is referring to (music, pictures etc.), as these are not considered critical file types and are readily viewable without the aforementioned tweak.
Arming the average computer user is commendable and, to be honest, many of the suggestions here will save low-level users some money by not wasting it on "fix it" software that does the same thing...but asking them to drive a tank after they just read the manual that someone hijacked with random pages from a Prius is only going to get them, and us, in trouble.