Recuva (a smallish free program from a respected software house via a trusted source) can help. Again I said FREE. << these folks also have a crap-deleting program that I use every day--I typically regain 100-500 MB of space. It's called CCleaner:
Neither of these come with the baggage of nagware to buy paid programs--most refreshing--they just do the job then get out of your way.
NB I have no connection with these except as a very satisfied user.