So I haven't seen anything like this on the forum yet... if I'm mistaken please set me straight.
I have Ubuntu 14.04 and Mint 17 on separate partitions of the same hard drive, along with another backup hard drive on a HP Envy Dv7. Today I restarted my computer, and the computer didn't load the GRUB, or anything. In fact it was a black screen that reads, "Please install an operating system on your computer."
Thinking that the entire computer just crashed on me, I plugged in my live usb to see what information I could salvage from the computer and all the information is still on both partitions and the secondary drive.
I reinstalled Ubuntu just to see if that would solve the issue, but it did not. I still get the same error.