Turned off Dashboard and rebooted. Still won't empty the trash and gives same message that it's in use.

I have managed to delete all files and other folders but 2 folders. When you right click for package content there is a folder called 'contents' and a folder inside 'contents' called 'MacOSX'. I deleted everything but those 2 folders. I am unable to move the MacOSX folder if I try to move it, it just moves a copy. The only 2 items are a folder called 'Contents' and a folder called 'MacOSX'. Have tried renaming the 'Contents' folder and it still won't delete. Unable to rename the MacOSX folder.