How can I retrieve the deleted files from my computer?

In general, the computer on the deleted files are can be found in the Recycle Bin, but for many people, because of fear of computer garbage too much, so often need to recycle Bin garbage files, but here, if you want to perform this operation later, it is recommended that you will be inside the documents confirmed , you must not delete after the discovery, the original file is still very useful.
Very unfortunate, I have encountered such a problem, it is good to want to clean up their own computer, but did not expect that the computer is actually all the files are cleaned up, and then I suddenly remembered that there is a file is also needed to use, this is OK, the file is not backed up, And then I completely clean off, I am playing a big!
But what to do? I try to think of a lot of ways to find this file, of course, I also try to find ways to surf the internet, to see if this deleted files can be found back. Also is my own luck good, found A is called Dragon File Recovery software tool, this software is more professional can recover deleted files in the Recycle Bin tool, in the Internet to see a lot of people have used, and evaluation is good, it may be in a treasure to buy things more bar, All like to look at the evaluation first. Finally, the use of this software to recover files, from the installation to the final recovery files for almost half an hour, for themselves, the efficiency is relatively high.

How can I retrieve the deleted files from my computer?