When you delete a file, it’s physical content remains intact on the media, but the occupied space becomes marked as free. Next file which is saved to the disk may overwrite the contents of the deleted file.

Therefore, it is very important to make sure that no application writes to the drive or partition where deleted file is located, since every new file may overwrite the deleted file.

When you realize that the file which you need is deleted, you are supposed to follow some instructions:

• Do not open or close files and applications. Many applications create temporary files which may overwrite and corrupt your deleted files.
• Depending on your system configuration, you should perform of the following actions:
• If deleted files were located on the system disk (usually disk “C”), or if you have only one logical disk in the system, you should not install any software into the system, since it will most likely overwrite your deleted file.

Undelete Software:
Undelete Software allows you to recover deleted files. It recovers deleted files, lost files, and files deleted from Windows Recycle Bin. It also recovers files lost due to virus attack, corruption of hard drive, software malfunction or unexpected system shutdown.
Important Features of Undelete Software:

1. Recovers file even if it is emptied from the Recycle Bin.
2. Disk recovery after a hard disk crash.
3. Recover documents, video music and email.
4. Recovers deleted files and folders on FAT12, FAT16, FAT32 and NTFS File Systems.
5. Recover deleted files from IDE/SATA/SCSI hard drives.