For the past 2 days, my brother's computer has been going through dozens upon dozens of reboots. I re-installed Windows ~May 12th this year and he went on vacation May 28th (till July 24th). On July 24th, before he came home, I turned it on and installed some updates. Everything functioned perfectly. Then, I continued leaving computer on only to have it reboot on its own and fail to boot with the following message: "Reboot and select proper boot device or Insert Boot Media in Selected Boot Device and press a key"
It's been happening pretty much at all times during the day. He tried to play Diablo...reboot into error message. Leaves computer on while napping...reboot into error message, etc. I cleaned out the PC earlier this morning, disconnected and reconnected all the cables, and still receive this message.
The boot drive is the M4 64GB SSD (mine before I upgraded to Samsung 830 64gb). I had ZERO problems with it before passing it onto him ~May 12th.
Sorry for the long message, but I figured the better the description, the more helpful *shrugs*