Question win10 pro not booting from hard drive but booting from bootable usb pen drive

Jun 30, 2019
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I did install win10 pro from bootable pen drive after successful install from usb drive it is not booting from hard disk but when i restarting and press F12 key and selecting usb storage device as showing in when press F12 key so it is running windows 10 which i did install. but when I unplug so it is not running OS .
please help me .