I have found a free tool that can Unlock all of your files that are corrupted or cannot be deleted, if you cannot "unlock" the files the program will help you do other thing with them. It is called UNLOCKER, and you don't have to pay for it. To test it for yourself go to Google and type in the keywords "ccollomb free unlocker" and it should be at the very top of the list. It helped me take alot of corrupt content of of my computer.