In a windows 8.1 pro installation on an ASRock Extreme6 motherboard, my uefi/bios boot screen lists two different 'windows boot manager' entries under boot options.  One of these is good (when top priority, boot goes nicely) and I want to keep it; the other is evil (offers to repair an installation that is fine and erases my second SSD, thanks) and I would like to destroy it. How do I identify and destroy the evil boot manager?

Some background:

I broke an initial windows 8.1 64 installation by installing something so I reinstalled windows from scratch again, all good except I assume this has spawned the undead boot manager in question.

BCEDIT only shows one boot manager, and a boot loader (see image below).

I tried resetting the cmos and removing the cmos battery - no joy.

Any help much appreciated.