The files may get deleted in two different ways i.e. one is by using Shift + Delete keys and another by using Windows explorer. In Windows Operating system, when the files are deleted using Windows explorer, they have generally moved to the Windows Recycle Bin. Later, if you want those files back then you can restore them from Recycle Bin. Recycle Bin stores files and folders, which are marked for deletion. But, when the files are deleted using Shift + Delete keys, they are not moved to Recycle Bin instead they bypass the recycle Bin. Suppose you have accidentally deleted the some essential Excel files from your PC by using Shift + Delete keys then you cannot restore them from a Recycle Bin and this disaster condition may bring about a loss of essential Excel files. If you want to recover files on Windows then you need to take the advantage of a relevant file recovery software.
Generally, when you delete a file, the Operating system does not really erase the file from hard drive. The operating system just marks the file name in file allocation table with a special character, which tells the processor that the file has been deleted. Actually, Operating system replaces the first letter of deleted files with hex byte code i.e. E5h that specifies that the file has been deleted. Sometimes, you may accidentally empty the Recycle Bin is resulting in a loss of files. In general, hard drive stores files in non-contiguous manner. For instance, if you are storing large file where the file is not stored in contiguous locations instead it stores that file in free available locations even though they are widely separated on the hard disk. When the file is fragmented in this way, hard drive takes more time to access each individual part of the file for use. Therefore, you need to defragment the disk in order to improve the performance. While defragmenting, if sudden power failure occurs or if you accidentally turn off your computer then files may get lost.
Always, take a backup before defragmenting your hard disk to avoid loss of files. In general, when the files are deleted, file system marks that space as available for storing new files. Therefore, when you save or copy any new files over an affected hard drive may overwrite the old files resulting in permanent loss of files beyond the recovery. Assume you have deleted a few essential Excel files from a hard drive and you have not taken a proper back up of the essential Excel files then you should make use of the relevant file recovery tool as way to recover Office files from a hard drive.
The file recovery software recovers files that are accidentally deleted or lost from the hard drive. This software supports different types of hard drives like SATA, SCSI and IDE manufactured by different manufacturers like Seagate, Western Digital, Samsung, Hitachi etc. This software supports recovery of files from different types of file systems like FAT16, FAT32, NTDFS, NTFS5 and ExFAT. You can also download demo version provided on the official website, where you can view a list of recovered files. Later you need to buy complete version software in order to save the recovered files on any accessible drives of Windows.