When buying a new PC, it is now customary to no longer provide any system backup DVD. Also when inadvertently catches a virus that severely damages the USB key on which stood safeguard the recovery partition, it is impossible to use one located on the hard disk, since it had been cleared for more space on the partition data (games taking more and more space), and that the USB key has also contaminated the primary operating system, the only solution is to reinstall Windows, but with the help of a healthy carrier, hence the need for this purchase. Today everything works again perfectly nickel, but obviously I need to reinstall all my programs. That said, expect WINDOWS 10 end of 2015 to finally have a facility taking into account each equipment (touch or not). Although the famous Start button has returned to WINDOWS 8.1, but there was always the need MODERN UI interface for non-touch screens.
