Losing files on your computer can be a frightening experience if the files are of importance to you personally or professionally. Computer data recovery techniques include the most simple of operations, like simply retrieving an accidentally deleted file, to very complex file retrieval procedures that only professionals should attempt to do.
If you are trying to proceed with your hard disk recovery solution on your own, first start with the most obvious answer. Look in your recycle bin to see if the file has been placed there. If it is, you can choose the "restore" option, and your system will automatically put the file back on your computer where it was stored originally. Of course, if every retrieval was this simple, there would be no need for computer professionals who specialize in data recovery, so chances are you'll need to try a different technique to find your lost data.
If you've deleted a file on your computer, and you've emptied your recycle bin, don't despair. When a file is deleted on a computer, it's not erased immediately from the system. What actually happens is the computer marks the deleted file as "deleted", and it is no longer in view to users within your computer's files. The file remains on the hard drive until new data is saved over it, similar to recording songs on cassette tapes. So, in order for computer data recovery to happen on files that have been deleted, you'll need to attempt to recover them before new data has been written over the file.
The best thing you can do to increase your chances of success is to immediately stop using the computer until you've retrieved the deleted file. The more you use your computer, the more information will be saved and the more likely the information could be saved over the file you are hoping to get back!