So, I turned my desktop computer off. Left for a day and a half, came back, turned it on, and it says "Reboot and select proper boot device or insert boot media in selected boot device and press a key". I have no idea why it's doing this. I've went into the boot/bios area and selected both hard drives to boot from (only 2 hard drives) and neither works... I don't know what to do. Anyone got anything?