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.
Chemistry is the science that studies the composition, structure and properties of matter and the changes that occur during chemical reactions. Answer a few questions to see how good you really are in Chemistry?
Is it really hard for you to ignore that beep sound of a new email, Facebook notification or a text message, are you experiencing an urge to share the latest photo to Instagram or send a new tweet?