TinEye is a great reverse image search online service, that can tell you where an image came from, find different sizes of the image and you can find out if someone is using your image without your permission.
If any file can not be deleted, then you can use the program LockHunter, which removes the active connections of other applications to that file, which allow you to change or delete file.
Sometimes you get an email with a lot of attachments and saving them one after another to your computer can be really time consuming. Let's learn how to save all Outlook attachments at the same time.