Microsoft’s outlook email program stores data in your document and files directory path. All your emails and contact information can be found here (just follow through the path to find your user name folder, then look for the Microsoft folder, then finally either Outlook Express folder, or Outlook folder, depending upon which email program you are using). Look for the file names outlook.pst. This outlook.pst file contains your contact names and emails, and is a file you should be backing up regularly.