Back when using XP, to remove grub and restore XP mbr I simply booted into
XP setup, chose recovery and used the fixboot and fixmbr commands.

However the Vista repair is very different. If I select repair startup it
does not actually list vista as an option to repair. I tried repairing by
clicking next anyway but it found nothing to fix. Vista is there and
bootable, I am using it now, but I wish to restore its bootloader.

Can anyone please advise?