When you delete a file it’s not actually deleted but is moved into a hidden folder called Recycle Bin; which is helpful when a person deletes a file accidentally and later realize it. It can be restored from Recycle Bin. But when it comes to the scenarios like:

• Recover space on your hard disk by emptying the Recycle Bin.
• As only a certain amount of space is kept for use by the Recycle Bin, any newly deleted files that would push it and the older files will be deleted.
• By using the Shift+Delete keys which bypass from recycle bin.

Deleted files recovery software uses advanced techniques to locate the deleted file and restores them back to a safer location which retrieves your files even in the above mentioned scenarios. Accidental deletion of files is the most commonly faced data loss problem. If you have emptied the recycle bin, then most file recovery programs will work if you haven’t saved any new files since emptying. Emptying the recycle bin doesn’t actually delete the files in question; it simply removes their information from the directory making that space available for being overwritten. So if you haven’t written any new files, chances of recover files recycle bin are very good.