Well ive built my first gaming PC and i know little to nothing about computer hardware i had to watch countless video and go to who knows how many websites and forums to finally get it put together and now that its together the computer turns on fine i hear the beep from the on board speaker but my monitor says Reboot ans select proper boot device or insert media in selected boot device and press a key ive switched around the boot priority in the BIOS and nothing ive got a disk that i burned the trial version of windows 8 onto in the dvd drive and i plan to upgrade from that and like i said im basicly clueless when i comes to hardware and the technical stuff when it comes to computers so if anyone can help try to explain what i should do on a very simple level thanks