Right now, you could be reading this this article because you or someone in your family has deleted a file on your computer system that you want to restore. Deleting files by mistake is a common problem, but it does not necessarily mean that your file, or files, are gone forever. Based on how much you have used the computer since the file was deleted, there is a chance that you might be able to retrieve it.
When someone decides to delete a file, the hard drive doesn't actually delete it in that sense. Once you decide to delete a file and you even empty your recycling bin the computer doesn't delete the file, it just makes the computer aware that the file can now be overwritten if that is needed. If the computer has not been used much since the file was deleted and therefore has not overwritten the file yet, you should be able to restore it.
The software you need to perform an operation like this can be found on the internet for free, although most of these software programs costs a few dollars. Upon downloading a file recovery program there should also be a guide to that specific program that will guide you through the actual process. Keep in mind though, that the file may have been overwritten during installation of other programs after you deleted it.
In some cases the hard drive itself has been damaged physically. In that case, you should contact a professional service online, or in your local area to help you or to guide you through the process. In general, it is safer to let an expert retrieve lost files, than trying to retrieve it yourself.
To learn more about the different types of data recovery and backup, visit http://www.mikkelworld.com/backup/