I successfully installed Win 8 on a new partition e: on main hard drive with Win 7 on c:. All was fine with pc booting into Win 8 by default. I used the option on booting into Win 8 to make Win 7 the default OS. This was fine with an option appearing before going into an OS giving choice to leave as boot to Win 7 or changing to Win 8. This option has now disappeared.
After instal of Win 8 I think I am right in saying Win 8 was given c: drive letter, after using option to make Win 7 the default the c: designation went back to c:, but not 100% sure if that was correct.
Question is, how to get the option on which OS back.