What's not clear about "reboot and select proper boot device"?
Select your hard disk, a bootable CD/DVD or a bootable USB stick to boot from.
It seems this can happen if the hard disk or the interface to it on the motherboard is defective. So boot into your Windows setup disc and try the various repair options. All will fail if it doesn't see the hard disk.
Hi I’m really new with the whole computer thing so I’ll appreciate it if you could explain somethings Anyways my problem is my Asus computer is continuously booting into Aptio Setup and I’ve gotten out only to result into the whole reboot and select proper boot device screen and then I don’t know what to do i really appreciate anyone who can help me out thanks!

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