What makes a hard disk drives unique as compared to solid state digital storage is that a hard disk drive is still a mechanical device. As such, it is prone to all kinds of physical glitches. In laptop computers the hard disk inside of a hard drive can lose important data just by being bumped around too often. Desktop computers are more prone to data lost when startup of shutdown is interrupted. Because these computers seldom have battery backups they are very susceptible to incomplete data transfer resulting in file loss. Generally speaking these physical bumps and bruises do not result in permanent physical damage to the computer hard disk drive. But, very frequently they do result in loss of data and unfortunately the data lost usually is required to start Windows. Needless to say, if you cannot start Windows, you cannot start your computer and this means you cannot access any of the files on your hard drive. Often people innocently reload Windows so as to be given access to their computer without realizing that reloading the operating system deletes all of the files stored on the hard drive. Before you can reload Windows you must use a program for hard disk recovery. A great program for exactly this is difficult to find. You need a program that will start up your computer even if the Windows operating system has been damaged. It will then allow you to access your hard drive and copy out any or all files so that you may safely reload your Windows operating system.