This is the failure of operating system Follow these steps or watch above video
1 Turn off the system .
2 Insert windows Bootable USB or CD/DVD.
3 Turn on the System.
4 press the boot menu button.
(Dell = F12 , Hp = F9 , Acer =F12 , Lenovo = F12 , Samsung = F10 , L.G = Fn+Esc )
Install complete windows and enjoy
if windows is not installing or installing very slow in speed then its your system's hard drive problem you should change the the hard drive and install the windows.
click here to know How to Install windows