Laptop lenovo g580. Created bootable usb using unetbootin. Ubuntu, lubuntu, boot repair - boot, windows - doesn't, both xp, 7. On the screen unetbootin, default, it will load in 10 sec, after 10 sec again in 10 sec and so on, when press on default nothing happens. Earlier i installed win 7 using bootable USB and the same unetbootin, so at that time it did boot.