A typical form of data recovery software is undeleted software, which allows you to restore files that you have accidentally deleted. However, remember that after you delete a fordatarecovery document the hard disk marks it as available storage. In other words, anything you do after deleting that file - whether downloading undelete software, saving another file, or even just shutting your personal computer down as normal - can overwrite the info, making it impossible to recover without a data recovery service. An easy method around this is to download the undelete software to a separate drive, such as for instance an external drive or perhaps a USB drive. Unless you know what you are doing, though, you must probably call an expert straight away - the longer you wait, and the more you tinker with your personal computer, the more likely you are to create the necessity for major data recovery in order to restore your deleted file.