Geeks, please accept the hero post of 2021 Microsoft x Intel hacking contest>>>

In win8’s computer installed an Ubuntu 13.10, composed of dual system, the result after the start of such a prompt, the key is not even win8 into
after checking the method on the Internet, it has been solved

problem description : boot prompt no such device grub rescue and other error messages
cause of the problem : due to the loss of the master boot record MBR
solution : one is to repair MBR in windows, and the other is to repair MBR in Ubuntu. Because I couldn’t get into windows at all, I fixed it with Ubuntu. To use the installation disk of Ubuntu, what I do is to make the startup disk of U disk, insert it into the computer, boot it with U disk, select “Try Ubuntu”, then open the terminal with Ctrl + Alt + T, and type:

sudo apt-get install lilo  
sudo lilo -M /dev/sda mbr

Restart, it can be solved