Shifting the delete.

Each of us with either a desktop or a laptop always assume that our system is safe and there is no possibility of any kind of intrusion either physically or through network hacking. Factually speaking the rate at which this assumption becomes true depends on the level of knowledge one possess with respect to the system configuration and security mechanisms provided or applied in the system.
To be precise consider a simple operation being performed often or even every time using a system. We use the Shift + Del to delete a file permanently. Things happening behind this operation is, Windows removes only the file name from the File Allocation Table. The real data remains on the hard disk till some other data is written on it. Thus with proper tools and knowledge one could easily have that data back. So, in order to delete a file completely out of your hard disk use either a file shredder or some eraser tool.