Interesting problem! I just spent a lot of time looking for software to help get rid of unwanted system folders. I had this problem with a partition in the past, but was able to move my data and delete the volume, but I see you problem. The only programs I found is "OK'd" on C CNet as Virus free, but they do warn you that it will try to install a stupid toolbar if you don't uncheck it ( no different than CCleaner, which many of us use regularly ). So that being said, it seems that " Unlocker" simply works in the background and allows you to delete files and folders that won't normally delete. I just installed it and then ran a virus scan on my OS and the download partition and it didn't find anything, so I hope I am not recommending...