This one just happened to me. My friend just found out that cookies and cached data from his web browser actually takes up a significant amount of space. He texts me really enthusiastically: "Do you know what cached web pages and cookies are?? I just deleted them and I got like 7GB back on my computer!" He's a computer science major in my class -_-. I explain to him really briefly what cookies and cached webpages are, and I recommend him CCleaner to do that kind of cleaning for him. He responds with something like "cool, but I'll just stick with the built in stuff on chrome." I don't want him to miss out on an awesome utility so I throw in some extra information: "You should use CCleaner anyway, it can also clean your registry for you." The answer I got to that was priceless: Spoiler "OH! You mean like the accumulator and index register!!!" That is quoted character for character, and I laughed my ass off for a good 10 minutes before I finally got myself together enough to send him a nice sarcastic reply.