It is possible to recover the deleted files back from the hard disk  (even after you have Shift+Deleted)  provided you act as soon as you realize that the files are deleted and use the best deleted files recovery software. In this post you will find a detailed information on how to recover the deleted files from your Windows PC or Mac.
I recommend the following softwares to recover the deleted files :

1. Stellar Phoenix Data Recovery (for Windows)

2. Stellar Phoenix Mac Data Recovery (for Mac)

Stellar Phoenix is one of the best company specializing in deleted files recovery services and solutions since 1993. Stellar’s Data Recovery Solutions encompasses a wide range of software for almost any data loss situation ranging from accidental formats to virus attacks to software malfunctions. Hence Stellar provides the best tools to recover deleted files with over 1,000,000 satisfied customers across 137 countries.

How the File Deletion Process Works?

When you delete a file from your computer (or even from the recycle bin) the file is not actually deleted. Unlike what most people think, the file is not permanantly deleted or dropped from your hard disk.when you delete a file from your hard disk, only the pointer which points to this file is removed and not actually the file itself. This file still exists intact and is 100% possible to recover it back in the original condition. In this condition the file becomes invisible and hence appears to have deleted.

Recovering the Deleted Files

 In order to recover the deleted files all you need to do is perform a scan (search) for the deleted files using a File Recovery Software. Please be informed that there is no manual way to recover the deleted files. The Data Recovery software performs a thorough scanning of the hard disk sector by sector and will locate the existence of deleted files to restore them back in the original condition. It is the only software that supports 185 popular file types including Windows NT Registry, JPEG, MP4, GIF, BMP and MS Word files. The software offers rich graphical support and incorporates advanced scanning methods to completely scan and recover deleted files from your hard drive. With this you can

• Recover FAT16, FAT32, VFAT, NTFS, and NTFS5 file system partitions
• Recover deleted emails
• Recover deleted documents
• Recover deleted photos
• Recover deleted music
• Formatted Hard-Drive recovery
• Recover files from USB Drives, CDs, DVDs and memory cards
• Recover almost all the camera format files

Visit the following links for more information on Stellar Data Recovery

 1. Stellar Phoenix Data Recovery (for Windows)