Hard Disk is just like the heart of computer system, when your hard drive does not work properly. You will not be able to perform any work on the system. There are many instances in which the hard drive data get lost & become inaccessible such as virus attacks, MFT corruption, BIOS error, Installation of malware infected files from the Internet, inserting the dirty pen drive, mechanical damage to the hard drive, power failure, abrupt system...
