I keep getting an error on start-up that says "Reboot and select proper boot device." I got this after formatting my hard drive to try to install Windows 7 again. So far I've tried every solution I've found on the internet, including checking the boot order in the BIOS, checking the connections in the optical drive, using USB's and CD-ROM's, using different versions of Windows, and using different software to convert the ISO into a usable format. Nothing works.