Aoli wrote:

What about repair boot on the Macrium Reflect PE etc disk generated by
Macrium Reflect ?

Under normal circumstances, where we understand what's going on,
the Boot Repair on the Macrium CD is excellent for this stuff.

However, in this case, we don't understand the exploit mechanism,
or, what will happen if we attempt to correct it.

Maybe it works, and works fine.

I would feel bad though, if the OP could no longer
boot and it was my fault :-)

Since the system is running, you can debug to your
hearts content with HxD, and try and figure out what
the security products have done to affect this. Sure,
paving over it is fun. Will it stay paved over ?
That depends on your "opponent".

Any time someone or something is fouling up a machine,
you really don't know what happens next.

Betting odds say you're right about this, and I'm worried
about nothing. However, if the security software loads
a Startup Item, it could pave it over as revenge.

Paul