Install kali linux with bootable usb and no os present in it

Jun 2, 2018
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I'm using acer laptop after factory reset while installing windows I had powered off now I'm not able to install windows .now when i on the laptop acer screen appears and loads after that screen becomes black .now i want to install kali linux using bootable device made using rufus.while using boot menu the usb device is not showing and while usb is connected can't acces boot menu.please help