Taking control of folder Win 7

I cant open C:\documents and settings\all users\application data folder every time I try it says access denied. I tried taking ownership still access denied. WTF am I missing something
Answer #1
read this http://www.jimmah.com/vista/Security/junctions.aspx
Answer #2
I managed to figure it out the application data folder isnt real it just redereacts to a different folder