Did you see any files in the folder after you changed the view settings? If so, you'd need to take ownership of them - I usually take ownership and delete them one at a time, and then take ownership of the empty folder, and then delete it. Usually, this is best done in Safe Mode.
I haven't had that procedure fail to delete any files yet, but every computer is an adventure of it's own: and it may indeed help to try a third-party delete utility (you'll notice that many of these need to reboot the computer to truly delete things). If "Unlocker" isn't successful, there is a tool used by some of my security-minded friends called "killbox". You have to be careful when using it, but it is generally successful. I haven't had a need for "Killbox" myself, so I can't say that I've tried it myself. It has only be recommended to me by others. You can find killbox at http://www.softpedia.com/get/Securit...-Killbox.shtml
That files on your computer have settings keeping you from being able to delete them can be a strong sign of a malware infection - whether currently active, or dormant, or a leftover from a previous infection. Might be a good idea to try the 5-Step Security Checklist to take a closer look at that http://www.techsupportforum.com/showthread.php?t=15968
Best of luck
. . . Gary