Hey. I have had this issue for a day now. I have, or at least had, a perfectly working PC. All of my components are functioning, and work fine. I plugged in my external USB DVD drive (yes it works. my internal one is broken) to watch a movie. It would not load at first, so I booted from it by restarting my PC. After that, nothing worked. I no longer can get into Windows. First, it says "Reboot and select proper boot device", and now it is stuck on "Preparing for Automatic Repair". After a few seconds of that, the loading fades and I see a black screen. In the BIOS, I booted from Windows Boot Manager, and it just loads forever. I made sure that the first boot device in order was my HDD with the OS on it. No luck. I cannot get into safe mode, and I repeatedly pressed F8, SHIFT + F8, F1, and SHIFT F1. Seriously, how does a MOVIE break a PC?