Some programs such as AOL create folders to store temp files in. Problem is when you end the program they remain.
I use a program called > find junk folders <. i have not had any problems out of using it. The programs that need to generate a folder will see it's gone and do so.
I'm sorry to say it's not on my laptop so I don't have the link to get it. But you can use good old Google to track it down. Check
www.majorgeeks.com for it too.