Hi John,
Yes I checked whether it was switched and it is.
Have re-installed W10 over the existing OS, but has made no difference.

I think I'll just accept the pain and do a complete re-install of BIAB and see where we go from there.

Am losing the will to live at the moment.

BTW, I tried it out on my laptop and everything worked fine, so it is something on my desktop which is causing the problem.

So here we go.........

BIAB 2017 Everything, RB 2017
Lenovo All-in-One. i5, 8gb Ram, 1 TB SHDD, Windows 10
Presonus AudioBox,Studio One 3, Behringer Xenyx302,
M-Audio Axiom 61, Samson Graphite 49.
Lenove Flex 15, i3,Windows 10