I have been having this issue very recently, where my desktop pc (Dell 8300 XPS) would freeze. Everything would become inactive within about 5 minutes of startup, and various errors would start appearing such as "failure to display security and shutdown options," and many of the "0x0000000" type errors. A blue screen would then display and the pc would restart. Then this message appears: "Reboot and Select proper Boot device or Insert Boot Media in selected Boot device and press a key." The message would keep displaying after pressing a key, so my only option is to turn off the pc. After powering it back on, windows would boot normally into the desktop, but then after about 5 minutes, everything would slow down and freeze, and I would go through the whole process again. Any help would be appreciated.