reboot loop

I built my first rig a few years ago and haven't had too many major issues with it until last week. I used it as usual and shutdown before going to bed. When I woke up the next morning and turned it on, I was met with "Reboot and Select proper Boot device or Insert Boot Media in selected Boot...

Hi, my Windows 7 installation is stuck in a "Failed to configure" loop. It started on Monday when, while turning off Windows, it displayed "Installing update 96 of 127" or something like that, which was odd, since I used this machine on Thursday and Friday and it already had installed updates...