Put the disc in the disc drive, and then start the computer.
Press a key when you are prompted.
Select a language, a time, a currency, a keyboard or an input method, and then click Next.
At the System Recovery Options menu choose ‘Command Prompt’
At the command prompt type in the command:
Note the gap between c and / it's meant to be there.
Press Enter to replace the MBR and then restart your computer.
Note: If your computer fails to boot from the disk you may have to change the boot order in your machines BIOS. If you need help with that let me know. Alternatively it may just be the wrong disk and we will move to another action suggested by one of my colleagues.